Games like GRID DEFENSE: GRID WAR
Games like GRID DEFENSE: GRID WAR include Taur, Aliens: Dark Descent, DG2: Defense Grid 2, Planetary Annihilation: TITANS, and Creeper World 3: Arc Eternal. We matched them by the tags players give GRID DEFENSE: GRID WAR on Steam (Tower Defense, Strategy, Free to Play, Sci-fi, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Taur
Shared: Tower Defense · Strategy · Sci-fi

Aliens: Dark Descent
Shared: Strategy · Real Time Tactics · Sci-fi

DG2: Defense Grid 2
Shared: Tower Defense · Strategy · Sci-fi

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

Creeper World 3: Arc Eternal
Shared: Tower Defense · Strategy · Sci-fi

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · RTS

Warhammer 40,000: Dawn of War - Definitive Edition
Shared: Strategy · RTS · Base Building

Mindustry
Shared: Tower Defense · Strategy · Base Building

Age of Empires III: Definitive Edition
Shared: Strategy · Base Building · RTS

Infested Planet
Shared: Tower Defense · Strategy · RTS

Age of Mythology: Retold
Shared: Strategy · RTS · Base Building

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

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

Halo Wars: Definitive Edition
Shared: Strategy · Base Building · RTS

Creeper World 4
Shared: Tower Defense · Real Time Tactics · Strategy

Outpost: Infinity Siege
Shared: Tower Defense · Base Building · 3D

They Are Billions
Shared: Strategy · Base Building · Tower Defense

Bloons TD 6
Shared: Tower Defense · Strategy · Singleplayer

Warhammer 40,000: Dawn of War - Anniversary Edition (Classic)
Shared: Strategy · Sci-fi · Base Building

Company of Heroes 3
Shared: Strategy · RTS · Singleplayer

Supreme Commander 2
Shared: Strategy · Sci-fi · RTS

Defense Grid: The Awakening
Shared: Tower Defense · Strategy · Sci-fi

Thronefall
Shared: Tower Defense · Strategy · Base Building

Supreme Commander: Forged Alliance
Shared: Strategy · Sci-fi · RTS