Free games like Alien Earth
Below are 8 free-to-play Steam games similar to Alien Earth, 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 Alien Earth page.
Ranked picks
- 1
The Lab
Free-to-play alternative to Alien Earth — no purchase or trial window.
Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!
- 2
The Riftbreaker: Prologue
Free-to-play alternative to Alien Earth — no purchase or trial window. Shares Action and Strategy with Alien Earth.
The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.
- 3
Shape of Dreams: Prologue
Free-to-play alternative to Alien Earth — no purchase or trial window. Shares Action and Adventure with Alien Earth.
《Shape of Dreams: Prologue》is a unique game that blends action roguelite with MOBA-style gameplay. Edit your character's Memories to create your own champion. Face all challenges alone or play with friends in up to 4-player co-op.
- 4
Wires And Whiskers
Free-to-play alternative to Alien Earth — no purchase or trial window. Shares Action and Adventure with Alien Earth.
Wires and Whiskers is a local co-op action-puzzle game where two players control a lab-engineered gerbil and its magnetic exosuit. Work together to fight mutated enemies, solve magnetic puzzles, and survive in a ruined, post-apocalyptic trench world.
- 5
SCP: Secret Laboratory
Free-to-play alternative to Alien Earth — no purchase or trial window. Shares Action with Alien Earth.
Deep within a secure underground facility, a sudden containment breach allows many of the secured anomalies to escape from their chambers. Assist the Foundation in re-securing the facility, help the Insurgency in their goal to capture it, or wreak havoc as an SCP in a frantic bid to escape.
- 6
STAR WARS™: The Old Republic™
Free-to-play alternative to Alien Earth — no purchase or trial window.
STAR WARS™: The Old Republic™ is a free-to-play MMORPG that puts you at the center of your own story-driven saga. Play as a Jedi, Sith, Bounty Hunter, or one of many other iconic STAR WARS roles in the galaxy far, far away over three thousand years before the classic films.
- 7
PlanetSide 2
Free-to-play alternative to Alien Earth — no purchase or trial window. Shares Action with Alien Earth.
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
- 8
Fallout Shelter
Free-to-play alternative to Alien Earth — no purchase or trial window.
Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland.