Games like Opollo

"Minishoot' Adventures" is a top-down shooter game with open-world exploration. Players control a spaceship, battling enemies and bosses in intense bullet hell combat, while venturing through a handcrafted world filled with hidden treasures, challenges, and secrets. The game features improving combat and exploration abilities as players reclaim stolen powers.

Astro Prospector is a roguelite bullet hell where you mine resources and upgrade custom ships to survive waves of enemies. With multiple ships, over 420 upgrades, and new modes like Endless Coffee, players strategize to defeat SpaceCorp and break the Universe. The game challenges you to master synergies and survive as long as possible against relentless threats.

Dome Keeper is a roguelike survival game where you defend your dome from alien attacks and dig for resources between waves. Use the materials and artifacts you find to upgrade your defenses and dig deeper underground. With procedurally generated levels and a variety of enemies, each playthrough offers a unique challenge.

Whisker Squadron: Survivor is a rogue-like action game where you play as a cat fighter pilot facing off against an alien invasion. You'll upgrade your plane and captain, battle through randomly generated stages, and take on giant bosses in intense bullet hell combat. With procedurally generated content weaved into a campaign, no two runs are the same in this feline-themed shoot 'em up.

"Thronefall" is a strategy game that simplifies traditional strategy mechanics while incorporating hack-and-slash elements. Players build up their kingdom during the day, defend it at night, and balance economy and defense. The game offers various strategies, such as building archers, walls, or mills, and choosing between ranged combat or charging into battle. The goal is to survive the night and see the sunrise over your kingdom.

Steredenn: Binary Stars is an award-winning rogue-like shoot'em up game with intense boss battles, randomly generated environments, and a vast arsenal of weapons. Experience quick, challenging sessions with upgrades and space events, available now on PC, Xbox One, PS4, Nintendo Switch, and iOS. Receive critical acclaim with user ratings around 90% on Steam and an average press rating of 8/10.

Steredenn: Binary Stars is an expanded version of the award-winning shoot 'em up game, Steredenn, offering infinite replayability through intense boss fights, randomly generated environments, and a vast arsenal of weapons. Play solo or with a friend in local co-op mode, choosing from 5 playable ships, each with unique abilities. The game provides quick, intense sessions featuring rock-hard boss battles that will keep you coming back for more.

"Nova Drift" is an action-packed space combat game where you control a rapidly evolving bio-mechanical ship. With over 250 weapons and mods, you can create a unique build every run, chaining upgrade modules for powerful synergies. Games are quick, allowing for rapid experimentation and advancement, making it a great choice for players who want to enjoy a challenging and rewarding experience in a single game session.

"LUFTRAUSERS" is a single-player arcade game with awesome gameplay, ingenious graphics, and a perfect soundtrack. Customize your Rauser with over 125 deadly combinations, and take to the skies for epic battles against enemy planes and ships. With hilarious moments, lots of grinding, and high replayability, this game will keep you entertained for hours. Be aware of some bugs, but they don't detract from the overall experience.

"Voidigo is a chaotic roguelite shooter with a focus on dynamic boss fights and weapon synergies. Play alone or with a friend in local co-op, battling bosses that adapt to your strategies. The game features stellar graphics, masterful mechanics, a stellar soundtrack and plenty of replayability, with grinding and humor for good measure."