Free games like Space Mercenary Defense Force
Below are 8 free-to-play Steam games similar to Space Mercenary Defense Force, 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 Space Mercenary Defense Force page.
Ranked picks
- 1
Life is Strange - Episode 1
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Action with Space Mercenary Defense Force.
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
Bongo Cat
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Indie with Space Mercenary Defense Force.
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?
- 3
Indigo Park: Chapter 1
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Action and Indie with Space Mercenary Defense Force.
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.
- 4
STRAFTAT
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Action with Space Mercenary Defense Force.
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.
- 5
NGU IDLE
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Indie with Space Mercenary Defense Force.
NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!
- 6
Awaria
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Action and Indie with Space Mercenary Defense Force.
Awaria is a short game about working in haunted maintenance tunnels.
- 7
Travellin Cats in Paris
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Indie and Casual with Space Mercenary Defense Force.
Find 100 cats hidden in Paris, France in this cute hand-drawn hidden object game by Travellin Cats - the original viral hidden cat game creator!
- 8
Grimm's Hollow
Free-to-play alternative to Space Mercenary Defense Force — no purchase or trial window. Shares Indie and RPG with Space Mercenary Defense Force.
A spooky, freeware RPG where you search the afterlife for your brother. Reap ghosts with your scythe, explore haunted caves, and eat ghostly treats on your journey through death.