Games like Sidewinder

77%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:story

94% User Score Based on 33 reviews

SCORCHING TECHBEAT ACTION! A frantic combo-based score attack shooter with roguelite elements. Make combos to earn more time. Master all weapons and defeat a raving mad machine. 100% arcade action. Online ranking. Lots of achievements. A Dual Gunstrike spin off. If you enjoyed this game, see our list of games similar to TechBeat Heart.

75%Game Brain Score

Most mentioned positive aspects:gameplay, story

Most mentioned negative aspects:stability, character development

81% User Score Based on 67 reviews

Critic Score 72%Based on 9 reviews

Dimension Drive is a space shooter that challenges your skills in entirely new ways. Play two games at once on this dual battlefield madness set on a comic book universe! If you enjoyed this game, see our list of games similar to Dimension Drive.

86%Game Brain Score

Most mentioned positive aspects:graphics, music

Most mentioned negative aspects:stability, grinding

86% User Score Based on 519 reviews

Get back to some serious Old-School gaming with Syder Arcade! A love letter to Amiga games of the 90′, no coins, no upgrade grinding, just your tenacity and a motherload of alien invaders. Syder Arcade is a free scrolling, multi directional shoot ’em up, an uncompromised old-school experience, furious, challenging, straightforward. This game will bring you back in time, when bulky starships were … If you enjoyed this game, see our list of games similar to Syder Arcade.

99%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:story, optimization

99% User Score Based on 496 reviews

DEVIL BLADE REBOOT ●OverviewDevil Blade, a 1996 indie shmup released only in Japan, has received a full remake almost a quarter century later by the original creator, taking advantage of the latest technology. Dive into an immersive pseudo-3D experience that pushes the limits of pixel art. With a perfect fusion of background music and evolving stage design, you can experience a feeling o… If you enjoyed this game, see our list of games similar to DEVIL BLADE REBOOT.

88%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:story, grinding

88% User Score Based on 678 reviews

A twin stick shooter without the twin stick, Gunlocked is a sci-fi action roguelike about careful positioning and upgrade selection. Manage unique targeting systems across multiple weapons and upgrades, as you battle legions of alien ships, and then do it all over again! If you enjoyed this game, see our list of games similar to Gunlocked.

79%Game Brain Score

Most mentioned positive aspects:graphics, music

Most mentioned negative aspects:gameplay, stability

79% User Score Based on 180 reviews

Outnumbered is a mass-enemy top-down shooter with rogue-lite elements. You may be greatly outnumbered, but not outpowered. Evolve into the ultimate weapon of destruction! If you enjoyed this game, see our list of games similar to Outnumbered.

97%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:monetization, replayability

97% User Score Based on 109 reviews

Galactic Glitch is a space-roguelike with fast and physical combat. You fight in bubbles of glitched spacetime, hurling rocks, bouncing foes off walls and destroying your multi-part enemies piece-by-piece in tough-but-fair, souls-inspired combat. Explore, destroy, die, repeat. If you enjoyed this game, see our list of games similar to Galactic Glitch.

71%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:replayability, stability

77% User Score Based on 166 reviews

Critic Score 64%Based on 10 reviews

Battle for survival against waves of Martian mutants in this tactical twist on twin-stick shooters. Using the skills of your drone companion, make fight-or-flight decisions that drastically alter the threats you face. Will your choices lead you to freedom... or your doom? If you enjoyed this game, see our list of games similar to Solstice Chronicles: MIA.

92%Game Brain Score

Most mentioned positive aspects:music, graphics

Most mentioned negative aspects:story, stability

93% User Score Based on 120 reviews

Critic Score 92%Based on 1 reviews

You're going down... again. If you thought Descent went to the edge of 360° 3D power-blasting sensory insanity, then prepare yourself. You're about to plunge over the edge, and into the depths of Descent II. Suddenly warped into the outer reaches of the Zeta Aquilae System, your new mission sends you into the black depths of treacherous alien mines. You blast through enemy robots with powerful ne… If you enjoyed this game, see our list of games similar to Descent 2.

96%Game Brain Score

Most mentioned positive aspects:music, graphics

Most mentioned negative aspects:story

96% User Score Based on 98 reviews

Operation Steel is a roguelike shoot-em-up rendered in beautiful hand-drawn art. Blow up loads of enemies, destroy huge bosses, find weapons, and upgrade your load-out between levels. Combat the electronic legion across 20+ procedurally generated levels! If you enjoyed this game, see our list of games similar to Operation STEEL.

74%Game Brain Score

Most mentioned positive aspects:gameplay, humor

Most mentioned negative aspects:story, graphics

74% User Score Based on 169 reviews

BossConstructor is a game about building and flying your own spaceship!Building your Ship. The core feature of the game is its ship editor which allows you to freely assemble your own spaceships using a vast variety of modules (currently more than 60). The way you build your ships determines how they behave and what they are capable of doing. Since every module costs money, weight and energy, desi… If you enjoyed this game, see our list of games similar to BossConstructor.

85%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:grinding, stability

85% User Score Based on 598 reviews

Meltdown is a tactical arcade shooter featuring both singleplayer and intense online multiplayer. Become the most skilled soldier, choose your weapons, get the best upgrades, buckle up and start your mission. Be careful, each enemy has it’s own combat style, special AI and gear. Adapt to them to survive! If you enjoyed this game, see our list of games similar to Meltdown.

81%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:grinding, stability

81% User Score Based on 456 reviews

Super Galaxy Squadron is a fast-paced vertical shooter designed for human beings as well as shmup veterans. Featuring multiple game modes, a challenging but merciful difficulty curve, forgiving health system, and seventeen playable ships. If you enjoyed this game, see our list of games similar to Super Galaxy Squadron EX Turbo.

DiscordSteamSTORY When the human revolutionaries failed in the fifth struggle against the Empire, they chose to find new lands and start over. On the way to find a new home, they encountered obstacles from the Empire, and also met Zerg warlords in the borderlands. Will the revolutionaries be able to reach their new homeland? GAME CONTENT There are currently about 3 hours of story mode game content… If you enjoyed this game, see our list of games similar to Battle Echoes.

A dark and mysterious entity from another dimension has gained access to our world through a portal deep inside an ancient temple. Only a true fighter pilot like you can stop it before it rips apart the very fabric of space and time. But beware: many dangers lie ahead! Project Möbius is a fast-paced 3D game inspired in part by 2D Shoot 'em up games such as Battle Squadron for the Amiga. Your goa… If you enjoyed this game, see our list of games similar to Project Möbius.

86%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:story, optimization

100% User Score Based on 37 reviews

OverviewShizuku and Akane...two pilots bound by rivalry and friendship battle to save their world from malevolent cosmic forces! Revolgear Zero is a deeply satisfying, local co-op enabled fast paced arcade style Shmup with tons of customization options and replay-ability! Multi-directional boomerang style melee attacks, flamethrowers, burst lasers...a plethora of different weapons are at your dis… If you enjoyed this game, see our list of games similar to Revolgear Zero.

81%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:monetization, grinding

81% User Score Based on 399 reviews

Exciting and spectacular shoot'em up with daily missions and 100+ unique ships If you enjoyed this game, see our list of games similar to Phoenix 2.

68%Game Brain Score

Most mentioned positive aspects:gameplay, story

Most mentioned negative aspects:grinding, replayability

68% User Score Based on 174 reviews

You are a friendly-but-deadly Mech on a journey searching for your missing pilot in this action-packed roguelite shooter. Choose your missions and rewards, research skills, equip expansions, mod your weapons, install plugins, customize your looks and stylishly cut your way through hordes of evil AI. If you enjoyed this game, see our list of games similar to Uragun.

96%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:replayability, optimization

96% User Score Based on 399 reviews

Gearbits is a 3D action game where you pilot a giant robot. Use the mobility granted by your rocket boosters to fight massive swarms of vicious giant insects and face off against enemy pilots. Choose a machine and equip it with a variety of powerful weapons. This is a demo build, that contains the first five mission of the story campaign and gives a taste of what you can expect in the full game. T… If you enjoyed this game, see our list of games similar to Gearbits.

83%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:story, replayability

83% User Score Based on 220 reviews

WISHLIST THE FULL GAME About the Game This is the free prelude version of Mega City Police, Retrowave Skill-Based Action Roguelike inspired by truly old-school action movies. Prelude version Includes first 2 levels and 4 playable police officers of the full version. Hello, Officer. Mega City needs your services. Are you ready to uphold the law? The crime is out of control, the streets are not… If you enjoyed this game, see our list of games similar to Action Agents.

78%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:grinding, replayability

77% User Score Based on 1,482 reviews

Critic Score 80%Based on 1 reviews

Utilize your Spartan skills in this classified ONI simulation set during the events of Halo 2 in New Mombasa. Lead UNSC troops through numerous missions as you battle against enemy troops and fight to save Earth. If you enjoyed this game, see our list of games similar to Halo: Spartan Strike.

85%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:optimization, stability

87% User Score Based on 1,550 reviews

Critic Score 80%Based on 1 reviews

Project Nimbus is a high speed mech action game set in a post apocalyptic world. Players control 'BattleFrames' - humanoid battles suits armed with an arsenal of weapons. This is a mech game that lets you fly freely in the sky, dodge and intercept incoming missiles with machine guns, fight armies of hostiles with every kind of modern weapon you can imagine, Battle against numerous powerful coloss… If you enjoyed this game, see our list of games similar to Project Nimbus.

53%Game Brain Score

Most mentioned positive aspects:music, replayability

Most mentioned negative aspects:gameplay, graphics

66% User Score Based on 32 reviews

Diadra Empty is a free-roaming shoot-'em-up on a grand scale. Take the role of Nyalra and her faithful dragon Minimi in a fantastical quest to save her missing sister, and battle legions of monsters and menacing bosses. The touching storyline is complemented by the game's beautiful 2D visuals, particle effects and environments rife with enemies, and glowing projectiles. Diadra Empty gives you extr… If you enjoyed this game, see our list of games similar to Diadra Empty.

87%Game Brain Score

Most mentioned positive aspects:music, graphics

Most mentioned negative aspects:story, grinding

88% User Score Based on 609 reviews

Critic Score 82%Based on 1 reviews

Steredenn is a frenetic and chaotic space shooter, carved in big beautiful pixels, with insane boss battles. Embark in your ship and engage the fight against dreadful space pirates in a never-ending combat for your survival. Steredenn is at the crossroads between a shmup and a rogue-like. Enjoy the infinite replayability of the game with its unforgiving gameplay, intense boss fights, (almost) ran… If you enjoyed this game, see our list of games similar to Steredenn.

76%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:story, optimization

77% User Score Based on 86 reviews

Critic Score 75%Based on 7 reviews

For the very first time, highly acclaimed Japanese Arcade Shoot’em Ups: Vasara and Vasara 2 are made available to the whole world via this package: Vasara Collection! Science Fiction meets History in these arcade classics which take place in an alternate timeline Feudal Japan where technologically advanced weaponry and equipment are a reality, and heroes use flying motorcycles with amazing firepo… If you enjoyed this game, see our list of games similar to VASARA Collection.

76%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:story, replayability

80% User Score Based on 46 reviews

Luminosity is a fast paced arcade game. You take the control of a space ship and your objective is to close off the enemy drones and conquer a certain percent of the map in order to blow them up. Things quickly escalate and you face an increasing number of unique and challenging enemies and environments all trying to destroy your laser and blow your ship to pieces. To your aid you have a wide rang… If you enjoyed this game, see our list of games similar to Luminosity.

89%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:replayability

89% User Score Based on 101 reviews

The year is 2192 AD. The stellar-class all-purpose adminstrative computer ALLTYNEX goes berserk upon the Satariel System's activation, and 85% of humanity is wiped out within 72 hours. The remainder escape to the reaches of the solar system, but humanity is unable to cope with the new conditions. The ALLTYNEX War continues for fourty years. The year is 2232 AD. Humanity is down to a single fleet… If you enjoyed this game, see our list of games similar to ALLTYNEX Second.

98%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:optimization, story

98% User Score Based on 340 reviews

Prepare yourself for an insatiable rain of bullets, bombs, and beams in Crimzon Clover.From Japanese indie developers YOTSUBANE and AdventurePlanningService, this unique top-down shooter is a wild ride you won't want to miss out on.Your first step in Crimzon Clover: World EXplosion is choosing how you want to play, as well as which powerful ship will be yours to command. Choose your version fr… If you enjoyed this game, see our list of games similar to Crimzon Clover World EXplosion.

65%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:grinding

65% User Score Based on 124 reviews

How to survive on another planet teeming with monsters, if you are a bearded engineer? You must become Space Robinson! If you enjoyed this game, see our list of games similar to Space Robinson.

77%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:grinding, optimization

78% User Score Based on 2,144 reviews

Critic Score 33%Based on 2 reviews

Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the Tauron droids' homeworld against a relentless invasion. Will your Taur stand against the Imperion warmachine? If you enjoyed this game, see our list of games similar to Taur.

84%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:grinding, optimization

86% User Score Based on 432 reviews

Critic Score 75%Based on 1 reviews

Orbital Bullet is a fast paced 360° action-platformer with rogue-lite elements. Travel to numerous planets, where monsters and dangers await you. Use found ressources to craft new weaponry & upgrades to get stronger. Only a true master of 360° combat will be able to save his home. If you enjoyed this game, see our list of games similar to Orbital Bullet.

85%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:story, replayability

91% User Score Based on 158 reviews

Critic Score 78%Based on 7 reviews

Once upon a time… Andro Dunos is a side scrolling arcade game from shoot’em up category (Shmup). It's the sequel to the famous shoot’em up from Visco studio is coming to PixelHeart. It’s time to bring out your good old spaceship fighter in Andro Dunos II. If you enjoyed this game, see our list of games similar to Andro Dunos 2.

43%Game Brain Score

Most mentioned positive aspects:story, graphics

Most mentioned negative aspects:gameplay, optimization

43% User Score Based on 70 reviews

Immerse yourself in the brilliantly crafted world of walking and thinking machines and the corpses, hungry for the living flesh! You will be able to choose one of four characters with unique abilities and take part in the dramatic events that happened at the Facility №3826. If you enjoyed this game, see our list of games similar to Soviet Lunapark VR.

57%Game Brain Score

Most mentioned positive aspects:music, optimization

Most mentioned negative aspects:graphics, story

71% User Score Based on 31 reviews

Test your aim and dodging abilities against elite enemies, unique bosses and environmental hazards, as you uncover the secrets of the Antiprism and its connection to the extinct civilization of Arn. Collect items and credits from your encounters and use them to customize and upgrade parts of your ships - you will need all the firepower you can get in order to reach the end of our pilots' journey. If you enjoyed this game, see our list of games similar to Antiprism.

88%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:story, replayability

88% User Score Based on 51 reviews

The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a unified Earth government. The stage was set for an era of unpreced… If you enjoyed this game, see our list of games similar to ARMED SEVEN.

87%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:story

91% User Score Based on 112 reviews

Critic Score 70%Based on 1 reviews

Crisis Wing is a mid-90’s style arcade shoot’em up (shmup) game with frantic fast-paced gameplay and colorful pixel graphics. If you enjoyed this game, see our list of games similar to Crisis Wing.

93%Game Brain Score

Most mentioned positive aspects:graphics, gameplay

Most mentioned negative aspects:grinding, stability

95% User Score Based on 2,054 reviews

Critic Score 83%Based on 2 reviews

A first person shooter extravaganza where you take the role of Serious Sam, a badass killer whose goal is to defeat monsters commanded by Mental, an extraterrestrial entity that wants to destroy humanity. Serious Sam is a high-adrenaline arcade-action shooter heavily focused on frantic arcade-style single player action. In a world where cyberpunk meets fantasy-fiction and advanced technology is m… If you enjoyed this game, see our list of games similar to Serious Sam: The First Encounter.

80%Game Brain Score

Most mentioned positive aspects:story, graphics

Most mentioned negative aspects:replayability, character development

89% User Score Based on 45 reviews

Critic Score 64%Based on 2 reviews

Wings Of Bluestar is a 2D horizontal shmup (shoot'em up) that offers singe and local multiplayer. It's sci-fi themed and has an anime art style. The game offers a lot of features to unlock using ingame earned points, these features are like more credits, boss challenge, gallery etc. If you enjoyed this game, see our list of games similar to Wings Of Bluestar.

97%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:grinding

97% User Score Based on 122 reviews

IRON GUARD VR (DEMO) is a sci-fi tower defense game made in the spirit of classic RTS games. Lives of the surviving crew members are in your hands . Find out why the terraformer robots have rebelled and help evacuate your crew from an unknown planet, where survival is the new frontier.FEATURES:• A complete 360 degrees immersive gameplay.• Different game modes and styles.• VR and Non-VR game mode.•… If you enjoyed this game, see our list of games similar to IRON GUARD.

90%Game Brain Score

Most mentioned positive aspects:graphics, gameplay

Most mentioned negative aspects:atmosphere, grinding

97% User Score Based on 356 reviews

Critic Score 73%Based on 3 reviews

Welcome to Descent - 30 levels of the most mind-bending, stomach-churning action game ever. Featuring true 3-Dimensional worlds with light source shading, texture mapping, 3-D morphing, directional sound effects and sizzling music, this is technology taken to the limit.You begin deep below the surface of Lunar Base I where an unknown alien race has taken over the chasm of the Post-Terran Mining Co… If you enjoyed this game, see our list of games similar to Descent.

71%Game Brain Score

Most mentioned positive aspects:gameplay, graphics

Most mentioned negative aspects:replayability, grinding

71% User Score Based on 83 reviews

Also Announced at ONL About the GameCongratulations, Operator #8 You have been randomly selected for the ITER Corporation’s exciting vertical ventures department. Drill the pillars that encircle our homeworld, extract essential resources, and try not to get obliterated in the process. If you fail, don’t worry,  your replacement will be along shortly - probably with a better attitude. > … If you enjoyed this game, see our list of games similar to ITER-8.

70%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:story, grinding

100% User Score Based on 21 reviews

In Atomanta, you step into the role of Taria Takara, a space pirate on a mission to recover a highly valuable artifact hidden on the planet Azavuraz. Armed with the powerful Atomic Manta warship, Taria finally has a chance to claim the bounty and pay off the debts from her previous handlers. If you enjoyed this game, see our list of games similar to Atomanta.

96%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:graphics, story

96% User Score Based on 92 reviews

‘Oh, Bugger!’ is a first-person shooter set in a luxury space hotel overrun by alien hordes. As a professional alien exterminator, pilot your mech to blast aliens and destroy their eggs, ending the infestation for good! If you enjoyed this game, see our list of games similar to Oh, Bugger!.

76%Game Brain Score

Most mentioned positive aspects:story, gameplay

Most mentioned negative aspects:grinding, stability

86% User Score Based on 405 reviews

Critic Score 66%Based on 10 reviews

Zombies conquered the land of Tokyo. Without hope, in underground shelters, people lived quietly. Hisako, a girl who grew up underground, heard the word “school” from her grandmother. School is where children play and learn. It is a paradise for young people. The best place to spend their youth. Hisako dreamed of this “school”, and one day, she was on an underground train heading above ground. … If you enjoyed this game, see our list of games similar to DEAD OR SCHOOL.

95%Game Brain Score

Most mentioned positive aspects:gameplay, story

Most mentioned negative aspects:replayability

95% User Score Based on 110 reviews

Deep in the Nevada desert, in a secret underground government facility, a young robot boy is awakened by an unknown force. He finds the building infected with alien creatures and hostile robots… With his memory wiped, he sets out to uncover secrets of his - and the facility’s - past. If you enjoyed this game, see our list of games similar to Super Roboy.

59%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:graphics

85% User Score Based on 20 reviews

The Rush is a horizontal shoot 'em up with an MSX inspired art style and plenty of that arcade excitement (without a hunger for quarters)! Features: 8+ Unique stages Many enemies and boss fights that (I severely hope) are fun and challenging 13 different weapons that can be mixed and matched with one another 2 Playable ships with unique weapon variations Some surprising exploits I decid… If you enjoyed this game, see our list of games similar to The Rush.

74%Game Brain Score

Most mentioned positive aspects:graphics, music

Most mentioned negative aspects:grinding, optimization

81% User Score Based on 251 reviews

Critic Score 60%Based on 2 reviews

Discover a vast alien world. Fight the ferocious local fauna and killer machines. Reveal its secrets and find a way to escape. The Mobius Machine is a side-scroller action platformer with dynamic combat and heavy emphasis on exploration. If you enjoyed this game, see our list of games similar to The Mobius Machine.

93%Game Brain Score

Most mentioned positive aspects:gameplay, music

Most mentioned negative aspects:grinding

93% User Score Based on 54 reviews

A post-apocalyptic arcade shooter. Collect fuel and dodge enemy fire as you fight back against the evil Scorpio gang. Mixes cars, shmups and themes that would have been right at home in 80's anime and arcades.. If you enjoyed this game, see our list of games similar to Dead End City.

94%Game Brain Score

Most mentioned positive aspects:music, gameplay

Most mentioned negative aspects:story, stability

94% User Score Based on 1,422 reviews

Prepare yourself for an insatiable rain of bullets, bombs, and beams in Crimzon Clover. From Japanese indie developer YOTSUBANE, AdventurePlanningService, this unique top-down shooter is a wild ride you won't want to miss out on. Your first step in Crimzon Clover: World Ignition is as simple as choosing how you want to play, and which powerful ship will be yours to command. Choose your mode from … If you enjoyed this game, see our list of games similar to Crimzon Clover WORLD IGNITION.

79%Game Brain Score

Most mentioned positive aspects:graphics, gameplay

Most mentioned negative aspects:grinding, stability

86% User Score Based on 748 reviews

Critic Score 55%Based on 15 reviews

Sublevel Zero - Redux is a first-person roguelike six-degree-of-freedom shooter set in a universe where reality is falling apart. Take control of a lone gunship pilot whose mission is to loot and craft ancient technology. Descend into a vast underground facility, fighting through procedurally generated zero gravity environments to recover the technology you and your clan need to survive. If you enjoyed this game, see our list of games similar to Sublevel Zero Redux.