Single-player games like Sins of a Solar Empire II
Below are 15 single-player Steam games similar to Sins of a Solar Empire II, 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 Sins of a Solar Empire II page.
Ranked picks
- 1
Sins of a Solar Empire®: Rebellion
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.
- 2
Sins of a Solar Empire: Trinity®
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
- 3
Age of Empires II: Definitive Edition
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
42 Civilizations, 229 Campaign Missions, Singleplayer, Co-Op, Multiplayer, In-Game Editor, Mods, Cross-play...It is good to be the king.
- 4
Stardust Exile
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
Stardust Exile is an RTS set in the Milky Way galaxy, containing currently known stars and exoplanets with their real characteristics. The remaining star systems are procedurally generated. It has both online mode and single-player skirmish mode. The online server is persistent and single-shard.
- 5
FleetLord
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
A space RTS about decisions, not menus. Conquer planets, link them to fuel your war machine, and level up your empire with randomized perk cards. Crush all opposition.
- 6
Homeworld 3
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
Tactical, beautiful, and wholly unique, the GOTY-winning sci-fi RTS returns with Homeworld 3. Assume control and battle through fleet combat in dazzling, fully 3D space while the award-winning story unfolds on a galactic scale.
- 7
Hollow Stars
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
A deep 2D strategy of cosmic trade and faction warfare. Build trading empires, refine asteroids, lead fleets into battle and run faction politics — solo or in four-player co-op
- 8
AI War 2
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
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
Supreme Commander
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
For a thousand years, three opposing forces have waged war for what they believe is true. There can be no room for compromise: their way is the only way. Dubbed The Infinite War, this devastating conflict has taken its toll on a once-peaceful galaxy and has only served to deepen the hatred between the factions.
- 10
Stellaris
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
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.
- 11
Romance of the Three Kingdoms
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
"Romance of the Three Kingdoms" was first released in 1985. It was the first historical simulation game released in Japan based on the Chinese classical literature "Romance of the Three Kingdoms". Players become the leaders of their countries and strive to unite the land under their rule.
- 12
Rise of Nations: Extended Edition
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
Rise of Nations is back! Play the updated classic with full Steamworks integration and enhanced features!
- 13
Mount & Blade: Warband
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required.
In a land torn asunder by incessant warfare, it is time to assemble your own band of hardened warriors and enter the fray. Lead your men into battle, expand your realm, and claim the ultimate prize: the throne of Calradia!
- 14
Divinity: Dragon Commander
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy with Sins of a Solar Empire II.
You are the Dragon Commander. Your mission it is to reunite a broken empire and become the new emperor. Success depends entirely on your ability to efficiently rule your empire, build invincible armies and lead them to victory.
- 15
Wargame: Red Dragon
Single-player alternative to Sins of a Solar Empire II — playable solo, no multiplayer required. Shares Strategy and Simulation with Sins of a Solar Empire II.
The new reference in RTS at its best! The Wargame series returns to duty, larger, richer and more spectacular than ever before. In Wargame Red Dragon, you are engaged in a large-scale conflict where Western forces clash against the Communist bloc.