Free games like Sicarius
Below are 8 free-to-play Steam games similar to Sicarius, 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 Sicarius page.
Ranked picks
- 1
Star Fetchers
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action and Adventure with Sicarius.
The introduction to a wild ride with gangsters and deep state conspiracy theories
- 2
I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action with Sicarius.
A top down twin stick zombie slaying shooter that you are sure to play again and again!
- 3
The Riftbreaker: Prologue
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action and Adventure with Sicarius.
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.
- 4
Wires And Whiskers
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action and Adventure with Sicarius.
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
Wuthering Waves
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action and Adventure with Sicarius.
Wuthering Waves is a story-rich open-world action RPG with a high degree of freedom. You wake from your slumber as Rover, joined by a vibrant cast of Resonators on a journey to reclaim your lost memories and change the world.
- 6
Spiral Knights
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action and Adventure with Sicarius.
Join the ranks of the Spiral Knights. Stranded on an alien world, you must explore the ever-changing Clockworks beneath its surface.
- 7
Alien Swarm
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action with Sicarius.
Co-operative multiplayer game and complete code base available for free.
- 8
AirMech
Free-to-play alternative to Sicarius — no purchase or trial window. Shares Action with Sicarius.
AirMech® Strike is a fast paced Action-RTS game that can be played solo, coop, or competitively online. Earn Kudos and Experience in battle and unlock a wide collection of AirMechs and Units while you practice the perfect strategy to emerge victorious!