Games like Stellar Initiative
Games like Stellar Initiative include FTL: Faster Than Light, Wall World, Dungeon of the ENDLESS™, Stoneshard, and The Binding of Isaac: Rebirth. We matched them by the tags players give Stellar Initiative on Steam (Tower Defense, Roguelike, Strategy, Difficult, and Sci-fi): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Roguelike · Strategy · Sci-fi

Wall World
Shared: Tower Defense · Roguelike · Strategy

Dungeon of the ENDLESS™
Shared: Roguelike · Tower Defense · Strategy

Stoneshard
Shared: Roguelike · Strategy · Pixel Graphics

The Binding of Isaac: Rebirth
Shared: Roguelike · Difficult · Pixel Graphics

Dome Keeper
Shared: Roguelike · Tower Defense · Sci-fi

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Balatro
Shared: Roguelike · Strategy · Pixel Graphics

Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · Strategy · Difficult

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Strategy · Difficult

Tower Dominion
Shared: Tower Defense · Strategy · Roguelike

Rogue Tower
Shared: Tower Defense · Roguelike · Strategy

Cosmoteer: Starship Architect & Commander
Shared: Sci-fi · Strategy · 2D

Oxygen Not Included
Shared: Base Building · 2D · Strategy

Into the Breach
Shared: Strategy · Pixel Graphics · Roguelike

XCOM: Enemy Unknown
Shared: Strategy · Sci-fi · Difficult

Kingdom Rush Vengeance - Tower Defense
Shared: Tower Defense · Strategy · Difficult

Mindustry
Shared: Tower Defense · Strategy · Base Building

The King is Watching
Shared: Roguelike · Tower Defense · Strategy

Crying Suns
Shared: Strategy · Pixel Graphics · Roguelike

RimWorld
Shared: Strategy · Base Building · Sci-fi

Noita
Shared: Roguelike · Difficult · Pixel Graphics

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · 2D

Wall World 2
Shared: Tower Defense · Roguelike · Pixel Graphics