Free games like Master of Orion 3
Below are 8 free-to-play Steam games similar to Master of Orion 3, 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 Master of Orion 3 page.
Ranked picks
- 1
Sunrider: Mask of Arcadius
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
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.
- 2
Star Realms
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
Star Realms is a hugely popular space combat deckbuilding game. Download and play today (note: base set is required to play online) to find out why Star Realms is the winner of SXSW 2014 Board Game of the Year, 7 Golden Geek Awards from BoardGameGeek, and 2 Dice Tower awards!
- 3
Prismata
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
A perfect-information strategy game inspired by RTS, deckbuilders, and board games. Choose from three distinct technology classes and outwit your foes by snowballing your starting resources into a powerful cybernetic army. ABSOLUTELY NO PAY-TO-WIN.
- 4
Galcon 2: Galactic Conquest
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
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!
- 5
Terraformers: First Steps on Mars
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
Terraformers: First Steps on Mars is a free prologue of Terraformers, featuring an exclusive challenge to lead humanity's first attempt at settling the Red Planet.
- 6
Forgetful Dictator
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
A powerful dictator has everything he needs to conquer the world except a grasp of basic geography. Learn country names, trivia, capitals, and flags as you achieve world domination!
- 7
Stones Keeper: King Aurelius
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
Stones Keeper is a turn-based strategy game with RPG elements in which you explore a detailed fantasy world, lead the Order of the Griffin, and live through the final moments of King Aurelius
- 8
Starcade FACTIONS
Free-to-play alternative to Master of Orion 3 — no purchase or trial window. Shares Strategy with Master of Orion 3.
Starcade FACTIONS is a turn-based strategy game that puts you in command of epic, fast-paced ship battles, perfect for quick bursts of action.