Single-player games like Imperium
Below are 8 single-player Steam games similar to Imperium, 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 Imperium page.
Ranked picks
- 1
Polaris Sector
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy and Simulation with Imperium.
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.
- 2
Sid Meier's Civilization®: Beyond Earth™
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy with Imperium.
Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.
- 3
StarFringe: Adversus
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy with Imperium.
This is the story about the beginning of the conquest of outer space by earthlings. It began as a global idea of saving mankind from hunger and lack of resources, and ended as a brutal and merciless war in space far from Earth.
- 4
Shadow Empire
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy and Simulation with Imperium.
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.
- 5
ENDLESS™ Space - Definitive Edition
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy with Imperium.
ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.
- 6
Xenonauts
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy and Indie with Imperium.
Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.
- 7
Xenonauts 2
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy and Simulation with Imperium.
Wage a global war of resistance against an alien invasion. Command turn-based tactical battles, build a network of covert bases, directly control your fighter wings, and achieve strategic victory in a simulation of asymmetric warfare against a technologically superior foe.
- 8
Galactic Civilizations III
Single-player alternative to Imperium — playable solo, no multiplayer required. Shares Strategy with Imperium.
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.