Free games like Earth 2150 Trilogy
Below are 9 free-to-play Steam games similar to Earth 2150 Trilogy, 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 Earth 2150 Trilogy page.
Ranked picks
- 1
Zero-K
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
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.
- 2
Istrolid
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
In Istrolid you design your own unique spaceships from a large number of parts to fit your strategy and play style. With no set units or factions you are free to create a fleet where each ship has its own balanced strengths and weaknesses, from basic fighters and bombers to hulking battleships and speedy destroyers.
- 3
Galcon 2: Galactic Conquest
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
Galcon 2 is a demolition derby in space! Send swarms of ships from planet to planet to conquer the galaxy in this fast paced multiplayer strategy game!
- 4
IDUN Prologue - Frontline Survival
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
Step into the arena with IDUN: Prologue, a thrilling slice of our full-length defense RTS where real-time strategy meets rogue-lite chaos. Fight your way through unique mission objectives with overwhelming swarms of enemies.
- 5
Imperius
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
Imperius is an easy-to-learn, hard-to-master space RTS. Command devastating ships of the Imperius Navy and prove your loyalty by destroying everything in your path, no matter the cost.
- 6
Pixel Starships
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven.
- 7
Hades' Star
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
A unique space strategy game where thousands of players participate in one shared galaxy.
- 8
The Wall
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
[Servers Temporarily Shut Down!] Build. Gather. Breach. The Wall is a never-before seen mix of genres, where dynamic maps, slick combat, base building, and economy management all come together.
- 9
VEGA Conflict
Free-to-play alternative to Earth 2150 Trilogy — no purchase or trial window. Shares Strategy with Earth 2150 Trilogy.
Stake your claim, command your fleets, and wage epic war in space.