Single-player games like Stellar Initiative
Below are 15 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
Wall World
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Explore the mysterious Wall World on your giant robospider: mine for valuable resources, upgrade your equipment to fight off hordes of monsters, and discover exotic biomes in-between attacks. Will you be able to survive and learn the secrets of the Wall World?
- 2
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!
- 3
Mechs V Kaijus - Tower Defense
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Mechs V Kaijus is an addictive hardcore tower defense gameplay. In Mechs V Kaijus you take on the role of Commander of a powerful Mechs squadron. Improve your Mech, strategically place towers and factories on the battlefield. Deploy support units on the battlefield, and save our civilization.
- 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
Rogue Tower
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Rogue Tower is a tower defense game with roguelike elements and a continuously expanding path which you can influence. Unlock, build, upgrade, expand, defend.
- 6
Grey Goo
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required. Shares Strategy with Stellar Initiative.
Fight for control of a frontier world. Gather resources, build your base, and command your forces in battle. Survive long enough to unleash your ultimate weapon - THE EPIC.
- 7
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!
- 8
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!
- 9
The Bureau: XCOM Declassified
Single-player alternative to Stellar Initiative — playable solo, no multiplayer required.
The year is 1962 and the Cold War has the nation gripped by fear. A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.
- 10
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.
- 11
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.
- 12
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!
- 13
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.
- 14
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.
- 15
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!