Games like Mazing TD
Games like Mazing TD include Age of Darkness: Final Stand, XCOM 2, Age of Mythology: Retold, Creeper World 3: Arc Eternal, and Infested Planet. We matched them by the tags players give Mazing TD on Steam (Tower Defense, PvE, RTS, Strategy, and RPG): closest matches first, and among equally close ones the better-known games.

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

XCOM 2
Shared: Strategy · RPG · Tactical

Age of Mythology: Retold
Shared: RTS · Strategy · 3D

Creeper World 3: Arc Eternal
Shared: Tower Defense · Strategy · RTS

Infested Planet
Shared: Tower Defense · Strategy · RTS

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

Aliens: Dark Descent
Shared: Strategy · RTS · Tactical

Mindustry
Shared: Tower Defense · RTS · Strategy

Taur
Shared: Tower Defense · Strategy · RTS

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

Bloons TD 6
Shared: Tower Defense · Strategy · 3D

Starship Troopers: Terran Command
Shared: RTS · Strategy · Tower Defense

Outpost: Infinity Siege
Shared: Tower Defense · 3D · Robots

Mechabellum
Shared: Strategy · RTS · Tactical

Orcs Must Die! 3
Shared: Tower Defense · Strategy · PvE

Creeper World 4
Shared: Tower Defense · RTS · Strategy

Tower Dominion
Shared: Tower Defense · Strategy · RTS

Sins of a Solar Empire II
Shared: RTS · Strategy · PvE

Warpips
Shared: Tower Defense · Strategy · RTS

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

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

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

Lessaria: Fantasy Kingdom Sim
Shared: RTS · Strategy · Tower Defense

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