Free games like Gratuitous Space Battles 2
Below are 8 free-to-play Steam games similar to Gratuitous Space Battles 2, 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 Gratuitous Space Battles 2 page.
Ranked picks
- 1
The Riftbreaker: Prologue
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Indie with Gratuitous Space Battles 2.
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.
- 2
Crusader Kings II
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Simulation with Gratuitous Space Battles 2.
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
- 3
Cell to Singularity - Evolution Never Ends
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Simulation with Gratuitous Space Battles 2.
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
- 4
Toribash
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Indie with Gratuitous Space Battles 2.
Toribash is an innovative free-to-play online turn-based fighting game where you’re able to design your own moves. Complete control over character's body, hundreds of game mods and bloody mess with full body dismemberment - you've never been able to annihilate your enemies like that before!
- 5
Learn to Fly 3
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Indie with Gratuitous Space Battles 2.
Build your spaceship from scratch, earn funds and invest them into building a bigger, better spaceship as you try and fly your way up to space!
- 6
Endless Sky
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Indie and Simulation with Gratuitous Space Battles 2.
Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.
- 7
Zero-K
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Indie with Gratuitous Space Battles 2.
With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps.
- 8
Sunrider: Mask of Arcadius
Free-to-play alternative to Gratuitous Space Battles 2 — no purchase or trial window. Shares Strategy and Indie with Gratuitous Space Battles 2.
As Captain Kayto Shields, embark on a galactic voyage of heroism and survival. With his home world destroyed and his nation conquered, the inexperienced Captain Shields, and his newly minted vessel, the Sunrider, are left as the only hope against a galactic evil intent on subjugating all sentient life.