Free games like Cosmic Slime Defense
Below are 9 free-to-play Steam games similar to Cosmic Slime Defense, 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 Cosmic Slime Defense page.
Ranked picks
- 1
Life is Strange - Episode 1
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Action with Cosmic Slime Defense.
Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.
- 2
Ultimate Custom Night
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Action and Indie with Cosmic Slime Defense.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 3
Bongo Cat
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Indie with Cosmic Slime Defense.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
- 4
ENA: Dream BBQ
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Indie with Cosmic Slime Defense.
Experience surreal environments and inexplicable characters as ENA in a new wild world.
- 5
The Murder of Sonic the Hedgehog
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Indie and Casual with Cosmic Slime Defense.
Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!
- 6
Indigo Park: Chapter 1
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Action and Indie with Cosmic Slime Defense.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
- 7
STRAFTAT
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Action with Cosmic Slime Defense.
STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.
- 8
Awaria
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Action and Indie with Cosmic Slime Defense.
Awaria is a short game about working in haunted maintenance tunnels.
- 9
UpBoll
Free-to-play alternative to Cosmic Slime Defense — no purchase or trial window. Shares Indie and Casual with Cosmic Slime Defense.
UpBall is a game of climbing up by controlling the speed of time Each death will not reset the level or let you start over If you are unskilled, then stop the time and think about what to do next The game is inspired by “SUPERHOT”