Games like Dome Keeper
Games like Dome Keeper include Fallout 4, FTL: Faster Than Light, Fallout: New Vegas, The Binding of Isaac: Rebirth, and Dead Cells. We matched them by the tags players give Dome Keeper on Steam (Singleplayer, Post-apocalyptic, Roguelike, Action, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Fallout 4
Shared: Post-apocalyptic · Singleplayer · Action

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

Fallout: New Vegas
Shared: Post-apocalyptic · Singleplayer · Action

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

Dead Cells
Shared: Roguelike · Pixel Graphics · Singleplayer

STAR WARS Jedi: Survivor™
Shared: Singleplayer · Action · Sci-fi

Metro Exodus
Shared: Post-apocalyptic · Singleplayer · Action

Skul: The Hero Slayer
Shared: Action · Roguelike · Singleplayer

No Man's Sky
Shared: Sci-fi · Singleplayer · Space

Half-Life 2
Shared: Action · Singleplayer · Sci-fi

The Final Station
Shared: Post-apocalyptic · Pixel Graphics · Action

METRO Last Light Redux
Shared: Post-apocalyptic · Action · Singleplayer

God of War
Shared: Singleplayer · Action · Combat

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Post-apocalyptic · Singleplayer · Atmospheric

Deliver Us The Moon
Shared: Action · Singleplayer · Sci-fi

Ocean Keeper: Dome Survival
Shared: Action · Roguelike · Singleplayer

Dungeon of the ENDLESS™
Shared: Roguelike · Tower Defense · Sci-fi

The Binding of Isaac
Shared: Roguelike · Action · Singleplayer

Fallout 3
Shared: Post-apocalyptic · Singleplayer · Sci-fi

Wall World
Shared: Roguelike · Tower Defense · Pixel Graphics

STAR WARS™ Battlefront™ II
Shared: Singleplayer · Sci-fi · Action

Hyper Light Drifter
Shared: Singleplayer · Pixel Graphics · Action

Eastward
Shared: Singleplayer · Post-apocalyptic · Pixel Graphics

FAR: Lone Sails
Shared: Post-apocalyptic · Singleplayer · Atmospheric

