Games like Grey Galactic
Games like Grey Galactic include Aliens: Dark Descent, Planetary Annihilation: TITANS, Total War: WARHAMMER III, Door Kickers 2: Task Force North, and Door Kickers. We matched them by the tags players give Grey Galactic on Steam (Action, Strategy, RTS, Action RTS, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Aliens: Dark Descent
Shared: Strategy · Action · RTS

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Real Time Tactics

Total War: WARHAMMER III
Shared: Strategy · RTS · Real Time Tactics

Door Kickers 2: Task Force North
Shared: Action · Real Time Tactics · Strategy

Door Kickers
Shared: Strategy · Action · Top-Down

Men of War: Assault Squad 2
Shared: Strategy · RTS · Action

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · RTS · Action

Total War: WARHAMMER II
Shared: Strategy · RTS · Action

Broken Arrow
Shared: Strategy · RTS · Real Time Tactics

Company of Heroes 3
Shared: Strategy · RTS · Action RTS

Creeper World 4
Shared: Real Time Tactics · RTS · Strategy

Warhammer 40,000: Dawn of War III
Shared: Strategy · RTS · Action

Sudden Strike 4
Shared: Strategy · RTS · Real Time Tactics

Battlefleet Gothic: Armada (Classic)
Shared: Strategy · RTS · Real Time Tactics

DG2: Defense Grid 2
Shared: Strategy · Action · RTS

Infested Planet
Shared: Strategy · Action · RTS

Command & Conquer 3 Tiberium Wars™
Shared: Strategy · Action · RTS

Reassembly
Shared: Strategy · Action · 2D

Taur
Shared: Strategy · Action · RTS

Dune: Spice Wars
Shared: RTS · Strategy · Management

Total War: THREE KINGDOMS
Shared: Strategy · RTS · Action

Iron Marines
Shared: Strategy · RTS · Action

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Action

STAR WARS™ Galactic Battlegrounds Saga
Shared: Strategy · Action · RTS