57%Good matchExecutive Assault 2
83%2k83% positive reviews, Very Positive across 2k reviews·RTS · Building
—






Capture and upgrade planets, outsmart your enemies, and conquer the galaxy! Simple yet addicting, you can play alone or outsmart your friends in this 2D top-down space RTS. Completely free, no monetization, just fun!
Relentless Expanse
SteamCapture and upgrade planets, outsmart your enemies, and conquer the galaxy! Simple yet addicting, you can play alone or outsmart your friends in this 2D top-down space RTS. Completely free, no monetization, just fun!
Relentless Expanse was made by a small team to gain experience, we don't care about money, we just want you to have fun!
The goal of the game is to send your ships to capture other planets and defeat every other enemy in the galaxy. Upgrade your planets using energy to make them more powerful, and strategically outsmart your enemies with your superior tactics!
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
Executive Assault 2Shares RTS · Sci-fi · Space , adds Space Sim83% · 2k positive reviews57%Good match—
Stellar WarfareShares RTS · Sci-fi · Space , adds Combat84% · 283 positive reviews57%Good match—
Planets Under AttackShares RTS · Sci-fi · Space65% · 311 positive reviews56%Good match—
VoidExpanseShares Sci-fi · Space · Top-Down , adds Open World69% · 565 positive reviews55%Good match—
Interstellar Space: GenesisShares Sci-fi · Space · Grand Strategy , adds 4X85% · 706 positive reviews55%Good match—
Space ReignShares RTS · Sci-fi · Space , adds Space Sim79% · 264 positive reviews55%Good match—All matches
The best games like Relentless Expanse are Executive Assault 2, Stellar Warfare, Planets Under Attack, VoidExpanse, and Interstellar Space: Genesis.
Match on: filter matches for Relentless Expanse by tag