Free games like Martian Invaders
Below are 9 free-to-play Steam games similar to Martian Invaders, 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 Martian Invaders page.
Ranked picks
- 1
Life is Strange - Episode 1
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Action with Martian Invaders.
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 Martian Invaders — no purchase or trial window. Shares Indie with Martian Invaders.
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 Martian Invaders — no purchase or trial window. Shares Action and Indie with Martian Invaders.
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 Martian Invaders — no purchase or trial window. Shares Action with Martian Invaders.
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
Awaria
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Action and Indie with Martian Invaders.
Awaria is a short game about working in haunted maintenance tunnels.
- 6
Travellin Cats in Paris
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Indie with Martian Invaders.
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!
- 7
Grimm's Hollow
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Indie with Martian Invaders.
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.
- 8
The Expendabros
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Action and Indie with Martian Invaders.
The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.
- 9
Netherspace
Free-to-play alternative to Martian Invaders — no purchase or trial window. Shares Action and Indie with Martian Invaders.
A sci-fi shoot'em'up game with heavy focus on upgrades experimentation, featuring two unlikely heroes that must work perfectly together, despite their share of secrets, to surpass their limits and succeed in eliminating a threat that might destroy both Earth and Andraxia if left unchecked.