Single-player games like Celestis
Below are 12 single-player Steam games similar to Celestis, 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 Celestis page.
Ranked picks
- 1
Worbital
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy and Indie with Celestis.
With the shifting gravity on your side, aim your cannons, blast your enemies and enjoy the fireworks. Worbital is a real-time strategic artillery game in space, peppered with a heavy dose of cosmic chaos. The goal: be the last civilization standing!
- 2
Sins of a Solar Empire: Trinity®
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy and Indie with Celestis.
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
SPACECOM
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy and Indie with Celestis.
SPACECOM – a strategic-to-the-bone, starfleet command game in which deception, smart movement, and choices to battle decide victory or defeat.
- 4
Galactic Civilizations III
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy with Celestis.
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.
- 5
The Scouring
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy with Celestis.
The Scouring is an RTS with fast pace, high attention to detail and next generation experience. Lead humans or orcs in a Classic Mode or use one of powerful Heroes to fight for victory! Play alone or with friends. Use our modding tools to create maps and custom game modes! Join The Scouring!
- 6
D.O.T. Defence
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy with Celestis.
Welcome to the frontlines! Build towers, muster armies, and conquer the map. Challenge yourself in the single-player campaign following the Chroma Wars, survive relentless waves in solo defense, or battle it out in local matches against friends and AI bots. Victory comes with the last HQ standing!
- 7
Stellaris
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy with Celestis.
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.
- 8
Warhammer 40,000: Gladius - Relics of War
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy with Celestis.
Warhammer 40,000: Gladius – Relics of War brings you to a world of terror and violence. Four factions will engage in a brutal war for dominance over the planet’s resources. In the first turn-based 4X strategy game set in Warhammer 40,000 you will lead one of four unique factions.
- 9
Risk
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Strategy and Casual with Celestis.
Draft! Attack! Fortify! Play the original game of strategy and world domination — now for your PC. Enjoy the classic look and fun of RISK in an exciting new interactive experience. Play two ways as you strategize over the map and set out to conquer the world.
- 10
Windward
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Indie with Celestis.
Windward is an action-filled multiplayer sandbox game that puts you in control of a ship sailing the high seas of a large procedurally-generated world.
- 11
Project 5: Sightseer
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Indie with Celestis.
Open world multiplayer sandbox/RPG game. Explore, gather, build, research, and fight to protect what's yours -- by yourself or together with your friends.
- 12
Windward Horizon
Single-player alternative to Celestis — playable solo, no multiplayer required. Shares Indie with Celestis.
Trade, quest, fight, or simply set sail and enjoy the ambiance in this charming open world naval RPG. Sequel to Tasharen's fan favorite game Windward released on Steam in 2015.