Games like Data Defense
Games like Data Defense include Bad North: Jotunn Edition, Creeper World 3: Arc Eternal, Plants vs. Zombies GOTY Edition, Shadow Tactics: Blades of the Shogun, and Kingdom Rush - Tower Defense. We matched them by the tags players give Data Defense on Steam (Strategy, Indie, Tower Defense, Minimalist, and Abstract): closest matches first, and among equally close ones the better-known games.

Bad North: Jotunn Edition
Shared: Tower Defense · Minimalist · Real Time Tactics

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

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · 2D

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Indie · Tactical

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Tactical

Kingdom Two Crowns
Shared: Tower Defense · Minimalist · Strategy

Infested Planet
Shared: Strategy · Tower Defense · Indie

Minimalist Tower Defense
Shared: Strategy · Tower Defense · Minimalist

Wargame: Red Dragon
Shared: Strategy · RTS · Tactical

Rusted Warfare - RTS
Shared: Strategy · RTS · Indie

Taur
Shared: Strategy · Tower Defense · Indie

They Are Billions
Shared: Strategy · Tower Defense · RTS

Starship Troopers: Terran Command
Shared: Strategy · RTS · Tactical

Door Kickers
Shared: Strategy · Indie · Tactical

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Indie

Grim Nights
Shared: Strategy · Tower Defense · RTS

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

Aliens: Dark Descent
Shared: Strategy · Tactical · RTS

Circle Empires
Shared: Strategy · Indie · RTS

Age of Empires II (Retired)
Shared: Strategy · RTS · Real-Time

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

HoloParade
Shared: Strategy · Tower Defense · Indie

Thronefall
Shared: Strategy · Tower Defense · Minimalist

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