Games like Guardian Heart
Games like Guardian Heart include Kingdom Rush - Tower Defense, Kingdom Rush 5: Alliance TD, Kingdom Rush Frontiers - Tower Defense, Kingdom Two Crowns, and Plants vs. Zombies GOTY Edition. We matched them by the tags players give Guardian Heart on Steam (Strategy, Tower Defense, 2D, Minimalist, and Fantasy): closest matches first, and among equally close ones the better-known games.

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · 2D

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · 2D

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · 2D

Kingdom Two Crowns
Shared: Tower Defense · Minimalist · Strategy

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

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

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

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · 2D

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · 2D

Thronefall
Shared: Strategy · Tower Defense · Minimalist

Dungeon Warfare
Shared: Strategy · Tower Defense · 2D

Mini Metro
Shared: Strategy · Minimalist · 2D

Orcs Must Die!
Shared: Tower Defense · Strategy · Fantasy

Kingdom Rush 6: Genesis TD
Shared: Strategy · Tower Defense · 2D

The Last Spell
Shared: Strategy · Turn-Based Tactics · Singleplayer

Minimalist Tower Defense
Shared: Strategy · Tower Defense · 2D

Rogue Tower
Shared: Strategy · Tower Defense · Minimalist

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

Dragon Age™: The Veilguard
Shared: Fantasy · Strategy · Singleplayer

Relic Guardian - Tower Defense
Shared: Strategy · Tower Defense · 2D

Warstone TD
Shared: Strategy · Tower Defense · Fantasy

Bloons TD 5
Shared: Strategy · Tower Defense · 2D

Game Dev Tycoon
Shared: Strategy · 2D · Indie

Zup! S
Shared: 2D · Indie · Minimalist