Free games like Arcadium - Space Odyssey
Below are 8 free-to-play Steam games similar to Arcadium - Space Odyssey, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Arcadium - Space Odyssey page.
Ranked picks
- 1
Gatekeeper: Infinity
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Prologue version of the game Gatekeeper. Gatekeeper: Infinity is a fast-paced rogue-lite shooter where you'll search for the stolen Heart of the Universe and battle machine enemies! Play solo or join forces with friends in co-op mode.
- 2
Waves
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Waves is an Arcade Twin-Stick Shooter that's all about High Scores. Build your combo and drop bombs in pursuit of Leaderboard dominance over seven game-modes!
- 3
Evil Egg
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action with Arcadium - Space Odyssey.
Blast it all to hell.
- 4
Halls of Torment: Prelude
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Slay hordes of terrifying monsters in this horde survival roguelite. Descend into the Halls of Torment where the Lords of the underworld await you. Treasures, magical trinkets, and a growing cast of heroes will grant you the power to vanquish these horrors from beyond. How long can you survive?
- 5
Realm of the Mad God Exalt
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Embark on an exhilarating journey into the pixelated Realm of the Mad God! Join, an action-packed, free-to-play MMO bullet hell game. Discover a world with danger, challenges, and hidden treasures as you battle through waves of enemies. Team up with players and conquer dungeons to become a legend!
- 6
Disfigure
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Disfigure is a grim-dark action rogue-like where you battle relentless hordes of monsters lurking in the shadows. Unlock powerful weapons, craft god-like builds with hundreds of upgrades, slay colossal bosses, and push your limits in intense 20–30 minute survival runs!
- 7
Echoes+
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and Indie with Arcadium - Space Odyssey.
Echoes+ is an intense retro action space shooter that will test your reaction and concentration levels to the max!
- 8
Warframe
Free-to-play alternative to Arcadium - Space Odyssey — no purchase or trial window. Shares Action and RPG with Arcadium - Space Odyssey.
Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game