Free games like Alien Destroyer
Below are 9 free-to-play Steam games similar to Alien Destroyer, 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 Destroyer page.
Ranked picks
- 1
STRAFTAT
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
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.
- 2
Counter-Strike:Global Offensive
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
- 3
The Lab
Free-to-play alternative to Alien Destroyer — 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!
- 4
Shape of Dreams: Prologue
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
《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.
- 5
Tom Clancy's Rainbow Six Siege
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
Rainbow Six® Siege is the reference in tactical team shooters, where elite strategy and execution triumph. Enjoy free access to Quick Match, Unranked, and Dual Front game modes with a selection of operators.
- 6
Warframe
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
Awaken as an unstoppable warrior and battle alongside your friends in this story-driven free-to-play online action game
- 7
Unturned
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
You're a survivor in the zombie infested ruins of society, and must work with your friends and forge alliances to remain among the living.
- 8
SCP: Secret Laboratory
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
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.
- 9
Destiny 2
Free-to-play alternative to Alien Destroyer — no purchase or trial window. Shares Action with Alien Destroyer.
Destiny 2 is an action MMO with a single evolving world that you and your friends can join anytime, anywhere, absolutely free.