Single-player games like Stellar Initiative
Below are 14 single-player Steam games similar to Stellar Initiative, 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 Stellar Initiative page.
Ranked picks
- 1
Tower Dominion
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line!
- 2
Emberward
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Build twisting mazes with tetromino blocks and deploy unique towers in this strategic roguelite tower defense adventure!
- 3
Dome Keeper
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required.
Defend against waves of alien monsters in this unique roguelike action miner. Dig for resources, collect useful gadgets, and upgrade equipment to increase odds of survival – just hurry back before your dome is destroyed!
- 4
Wall World 2
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
The adventure in the mysterious world of the Wall continues! Pilot your robospider into its depths, uncover lost artifacts and technologies, upgrade your exosuit and spider, and battle the horrors lurking in the dark. Unravel the mysteries buried in the depths of the Wall!
- 5
Mineral Defense
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Mineral Defense combines tower defense with roguelite elements and procedural generation. Build paths, unlock upgrades, and unleash powerful synergies to conquer evolving challenges in an ever-expanding world.
- 6
Drill Core
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Corporate greed meets strategic planet-mining in Drill Core! Drill to the heart of planets while managing workers, researching cutting-edge tech, and fortifying against alien attacks. Will you prioritize efficiency and risk your workers' safety, or focus on defense for survival?
- 7
Deep Among the Swarm
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Deep Among the Swarm is a challenging survival RTS roguelite about surviving against thousands of enemies. Drill ever deeper underground while fighting the endless onslaught of the Swarm. Can you save humanity?
- 8
Utopia Must Fall
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required.
Defend humanity's last surviving metropolis from mysterious alien machinations in this challenging base-defense arcade shooter. Featuring rapid upgrade progression, procedurally generated attack waves, dark humor and laser-sharp aesthetics.
- 9
RimWorld
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
- 10
Oxygen Not Included
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required.
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
- 11
Slay the Spire
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
We fused card games and roguelikes together to make the best single player deckbuilder we could. Craft a unique deck, encounter bizarre creatures, discover relics of immense power, and Slay the Spire!
- 12
Module TD. Sci-Fi Tower Defense
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
This is Sci-fi Tower Defense created by gamers for gamers.
- 13
ROGUERIA: Roguelikes X Tactics
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Rogueria is a turn-based strategic combat game that focuses on the choice of various combinations and moments. You must collect and grow unfinished heroes, make the right choices from various monsters and various events that block your front, and lead the heroes to their destinations.
- 14
Hillforts
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Hillforts is a medieval card-based autobattler. Build an army, research technologies, upgrade your units, and siege the enemy castle!