Games like Radiant Defense
Games like Radiant Defense include Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, Plants vs. Zombies GOTY Edition, Bloons TD 6, and Bloons TD 5. We matched them by the tags players give Radiant Defense on Steam (Strategy, Tower Defense, Indie, Casual, and Colorful): closest matches first, and among equally close ones the better-known games.

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

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

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

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

Game Dev Tycoon
Shared: Strategy · Indie · Casual

Plague Inc: Evolved
Shared: Strategy · Indie · Casual

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

Rock 'N' Roll Defense
Shared: Strategy · Tower Defense · Casual

FTL: Faster Than Light
Shared: Strategy · Indie · Space

Creeper World 4
Shared: Tower Defense · Strategy · Space

The Escapists
Shared: Strategy · Indie · 2D

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

ShellShock Live
Shared: Strategy · 2D · Casual

Banana
Shared: Casual · 2D · Colorful

A Dance of Fire and Ice
Shared: Indie · Difficult · 2D

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

Your Only Move Is HUSTLE
Shared: Strategy · Action · 2D

911 Operator
Shared: Strategy · Indie · Casual

UFO 50
Shared: Indie · Strategy · 2D

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

A Game About Feeding A Black Hole
Shared: Strategy · Casual · Indie

Plebby Quest: The Crusades
Shared: Strategy · Indie · Casual