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Check out this fantastic list of free-to-play aliens games you can enjoy on Steam right now, updated on September 08th 2026. Looking for even more free titles? Explore the complete list of the best free to play aliens games on Steam.
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1. Alien Swarm
Co-operative multiplayer game and complete code base available for free. Alien Swarm is a co-op, action and multiplayer game. Released on July 19th 2010 has received 21,274 reviews of which 20,179 were positive and 1,095 were negative resulting in an impressive rating of 9.3 out of 10. The game currently holds the #1 spot among the most played aliens games.
9.3
20,179
1,095
12
players
2. 100 Aliens Cats
👽🛸 100 Aliens Cats - 🐾 Join the cutest adventure in the Aliens themed locations full of cats! Explore the charming hand-drawn artwork of aliens places and Cats as you embark on a quest to find 100 adorable cats hidden throughout the game. 🕵️♂️❌ Can you find them all? 🕵️♂️🐈✅ 100 Aliens Cats is a cats, hidden object and aliens game. Released on June 09th 2024 has received 2,121 reviews of which 2,027 were positive and 94 were negative resulting in an impressive rating of 9.1 out of 10. The game currently holds the #2 spot among the most played aliens games.
9.1
2,027
94
1
players
3. Void Whispers
Assume the role of a broadcast engineer in a tranquil city. All seems peaceful until the sky above starts to reveal something deeply unsettling. Void Whispers is a horror, psychological horror and immersive sim game. Released on April 06th 2024 has received 421 reviews of which 387 were positive and 34 were negative resulting in a rating of 8.5 out of 10. The game currently holds the #3 spot among the most played aliens games.
8.5
387
34
4. Alien Removal Division
The invasion has started and the secret military research facility has fallen leaving only chaos. As the only survivor, you must fight your way through the military base against a horde of frantic aliens. A.R.D. is a FREE single-player first-person shooter made by students from Breda University. Alien Removal Division is a parkour, fps and action game. Released on June 17th 2022 has received 1,089 reviews of which 968 were positive and 121 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #4 spot among the most played aliens games.
8.4
968
121
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