Games like Onslaught

Scionide is a fast-paced sci-fi action shooter set in the war-torn future of the Scion Conflict universe. In the year 2268 AD, humanity is fractured. The Amalgamate Republic, a shattered alliance of frontier colony words fighting for freedom, makes its final stand against the Scion Empire, a militarized regime led by the ruthless Duntana, alien hybrid daughter of the Scion Emperor. As the war rage…

Quake II is a classic first-person shooter set in a military sci-fi universe, where players must fight against a hostile alien race known as the Strogg. The game has been enhanced with up to 4K resolution support, improved animations, AI behaviors, and dynamic lighting, while also including the original mission packs and a new expansion, "Call of the Machine". Enjoy the intense single-player campaign, as well as online and local multiplayer with crossplay and motion aiming support. The game features the original, heavy rock soundtrack, and promises a thrilling and challenging experience.

"Halo: Combat Evolved" is a Sci-Fi shooter game that offers various play modes, including single-player, split-screen co-op, and multi-player for up to 2 players. As the genetically enhanced Master Chief, you must lead humanity's defense against the alien Covenant, crash-landing on the enigmatic ring-world Halo in a battle to save Earth from extermination, while unraveling the mysteries of this ancient construct. Local multi-player options provide further replayability and challenges.

Gears of War 2 is a horror shooter game that offers various gameplay modes, including local multi-player for 2 players, multi-player, co-op, and single-player with a split screen. The game continues the COG's fight against the Locust horde, who are attempting to sink cities on Sera using a giant riftworm. As Sergeant Marcus Fenix leads Delta Squad into the planet's depths, they discover the true intent of the Locust's actions, making for an exciting and suspenseful gaming experience.

"Silica" is a shooter/RTS hybrid offering 2-player co-op, PvP, and single-player action. Choose between human infantry or alien hive-mind, each with unique vehicles and creatures. Join the community through the official Discord server for updates, developer interaction, and player collaboration. Despite some bugs, the technical aspects, humor, and dense atmosphere make it a worthwhile experience.

WARSHIFT is the unique mix of the Action, Strategy and Role-playing gameplay elements that forms an innovative game genre. You can build base, manage troops, and then come down to keep your enemy at gunpoint in the dynamic battle and customize your main characters. This unusual gameplay requires a complete change of your play style.

Lil Tanks is an action-packed, side-scrolling shooter that puts you in control of a prototype tank -- defending humanity from the alien scourge known as The Cuur. As Earth's last hope, you must upgrade your tank with unique power-ups and blast the aliens back to where they came from! Level up by destroying The Cuur and earn powerful permanent upgrades. Unlock multiple tanks by completing objective…

"Enemy Mind" is a side-scrolling space shooter for PC with a classic 8-bit art style and 8 levels of challenge across 70 waves. As a being of pure psychic energy, you can take over and control any of the 20+ unique ships you encounter, each with their own power and ability. The game features an adaptive story system that changes with your play style and offers multi-player co-op for up to four players. The soundtrack is an original chiptune-inspired creation by Rainbow Kitten.

"Mass Effect: Andromeda - Deluxe Edition" takes players on a journey to the Andromeda galaxy as the Pathfinder, where they must find a new home and make choices that will determine humanity's survival. The Deluxe Edition includes Deep Space Explorer Armor, Nomad Skin , a Multiplayer Booster Pack, and Pathfinder Casual Outfit for customization. Your decisions will shape the future of humanity in this new galaxy.

In Red Faction: Armageddon, players return to Mars to fight off alien invaders in a destroyed underground civilization. As Darius Mason, they'll utilize advanced weaponry and the Nano Forge to survive and protect the red planet. The game features both single-player and multiplayer modes, with the latter including infestation mode where players cooperatively fight off hordes of enemies.