Games like Star Fleet Deluxe
Games like Star Fleet Deluxe include FTL: Faster Than Light, XCOM 2, X Rebirth, STAR WARS Zero Company™, and The Escapists. We matched them by the tags players give Star Fleet Deluxe on Steam (Strategy, Sci-fi, Singleplayer, Space Sim, and Wargame): closest matches first, and among equally close ones the better-known games.

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

XCOM 2
Shared: Strategy · Turn-Based Combat · Singleplayer

X Rebirth
Shared: Sci-fi · Space Sim · Simulation

STAR WARS Zero Company™
Shared: Sci-fi · Strategy · Singleplayer

The Escapists
Shared: Strategy · Singleplayer · Pixel Graphics

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

Hardspace: Shipbreaker
Shared: Sci-fi · Singleplayer · Simulation

Elite Dangerous
Shared: Space Sim · Sci-fi · Simulation

Stellaris
Shared: Strategy · Sci-fi · Singleplayer

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · Sci-fi · Singleplayer

X4: Foundations
Shared: Space Sim · Sci-fi · Simulation

Quasimorph
Shared: Strategy · Singleplayer · Turn-Based Combat

RimWorld
Shared: Strategy · Singleplayer · Sci-fi

Jurassic World Evolution
Shared: Strategy · Singleplayer · Simulation

XCOM®: Chimera Squad
Shared: Strategy · Singleplayer · Sci-fi

Nimbatus - The Space Drone Constructor
Shared: Strategy · Singleplayer · Sci-fi

Warhammer 40,000: Mechanicus
Shared: Strategy · Sci-fi · Singleplayer

Warhammer 40,000: Dawn of War III
Shared: Strategy · Sci-fi · Singleplayer

Dome Keeper
Shared: Singleplayer · Sci-fi · Action

X3: Terran Conflict
Shared: Sci-fi · Strategy · Space Sim

Halo Wars: Definitive Edition
Shared: Strategy · Singleplayer · Sci-fi

Into the Breach
Shared: Strategy · Pixel Graphics · Sci-fi

Starpoint Gemini Warlords
Shared: Strategy · Sci-fi · Space Sim

Starship Troopers: Terran Command
Shared: Strategy · Singleplayer · Sci-fi