Single-player games like Galactic Ruler
Below are 20 single-player Steam games similar to Galactic Ruler, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Galactic Ruler page.
Ranked picks
- 1
Tachyon Wars
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
Tachyon Wars is a sci-fi real-time space strategy game. It introduces seriously deep gameplay with an emphasis on fleet control. Open space to explore, large-scale battles, crafty AI. All of it is well seasoned with novel real-time game mechanics.
- 2
Riftborne
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Ruler.
Riftborne is a classic terminal based, real time, grand strategy game. Construct space ships. Take part in factional warfare. Hire galactic hit-men on your rivals. Raid neighbors for rare resources. Train spies to infiltrate enemy bases for key intel. Grow your empire to dominate the galaxy.
- 3
Galactic Civilizations III
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
- 4
Polaris Sector
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Can anyone build an empire in a place like this? Other factions are naturally suspicious of newcomers and may wage war at the first sign of unidentified craft. Here, a natural death is an uncommon luxury.
- 5
NEBULOUS: Fleet Command
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Take command of your hand-tailored fleet of space warships and use realistic radar, electronic warfare, advanced movement controls in 3D space, and precision targeting to outmaneuver and outwit your opponents in a simulation-heavy tactical space game like no other.
- 6
The Red Solstice
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
- 7
Europa Universalis IV
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Rule your land and dominate the world with unparalleled freedom, depth and historical accuracy. Write a new history of the world and build an empire for the ages.
- 8
AI War 2
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Ruler.
The most devious and acclaimed artificial intelligence in strategy gaming is better than ever. A grand strategy/RTS hybrid that reverses many conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground.
- 9
Stellaris
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.
- 10
Master of Orion
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
The ascendant spacefaring 4X strategy game returns! A new chapter in the epic Master of Orion saga is poised to once again capture the imaginations of millions of gamers.
- 11
Shadow Empire
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Shadow Empire is a deep turn-based 4X wargame with a unique blend of military focus, procedurally generated content and role-playing features. Players take the seat of the supreme ruler of a small nation, with the goal of reconquering a devastated planet.
- 12
Supreme Ruler Ultimate
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Ruler.
Real-Time Strategy/Wargame. From World War II through the Cold War and into the future, re-live or re-imagine the tensions and crises of our recent history! Guide your nation through the era of your choice in Campaigns, Scenarios, and Sandboxes, as you make every effort to become Supreme Ruler!
- 13
Distant Worlds 2
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Distant Worlds 2 is a vast, pausable real-time 4X space strategy game.
- 14
Supreme Ruler 2030
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Rise to power as any modern day country in a realistic military, political and economic simulation. Command your country's diplomacy, espionage, and resource management to strengthen your position. Use real-time tactical control of your military to fortify your place as the Supreme Ruler.
- 15
Supreme Ruler 1936
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Ruler.
Real-Time Strategy Game. Guide your nation through the most violent era in modern history. Play massive campaigns as one of the principal nations, set-piece scenarios of famous battles, or set your own victory condition and play as any nation in the world in Sandbox mode.
- 16
Supreme Ruler 2020 Gold
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
Supreme Ruler 2020 Gold contains Supreme Ruler 2020 and the expansion, Global Crisis: SUPREME RULER 2020 Overnight, the US dollar crashes AND the sound echoes across the globe. The economic crisis amplifies global instabilities and regional disputes, tearing the world asunder. Nations dissolve, economies collapse, and tensions escalate.
- 17
Supreme Ruler: Cold War
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy with Galactic Ruler.
Building on Supreme Ruler 2010 and 2020, BattleGoat Studios invites you to relive the tension and uncertainty of the Cold War. As the 1950’s approach, the Korean War looms, the Arms Race intensifies, the Berlin Crisis leads to the formation of NATO, and the world anticipates a new World War.
- 18
Supreme Ruler The Great War
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Indie with Galactic Ruler.
Real-Time Strategy/Wargame. BattleGoat Studios invites you to travel back to 1914 and select from more than 50 playable regions at the onset of World War I, as European powers struggle to survive and new technologies transform warfare.
- 19
Galactic Ruler Enlightenment
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Play campaign stories within the Galactic Ruler universe. Invade the galaxy to eliminate those who stand in your way or rally alien races to defend against the invaders. Fight battles at both planet and space across a procedurally generated galaxy. Use new unit control systems to manage your forces.
- 20
Supreme Ruler The Great War Remastered
Single-player alternative to Galactic Ruler — playable solo, no multiplayer required. Shares Strategy and Simulation with Galactic Ruler.
Return to WWI in the updated Supreme Ruler engine. Engage in global tactical combat. Manage your country's economy, research and diplomacy. Includes more than 50 countries set in 1914 or 1917 with no fixed end date. Enjoy improved game performance and visuals in this remastered title.