Games like GreySpire
Games like GreySpire include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give GreySpire on Steam (Casual, Strategy, Auto Battler, Tower Defense, and 2D): closest matches first, and among equally close ones the better-known games.

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

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

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

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Casual

Zero Stress King: Idle Defense
Shared: Tower Defense · Auto Battler · Strategy

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Auto Battler · Strategy

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

Hero's Hour
Shared: Strategy · Auto Battler · Pixel Graphics

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

Rogue Tower
Shared: Strategy · Casual · Tower Defense

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

Border Pioneer
Shared: Strategy · Tower Defense · Base Building

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

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Base Building

The King is Watching
Shared: Tower Defense · Strategy · Base Building

Thronefall
Shared: Strategy · Tower Defense · Base Building

Warpips
Shared: Strategy · Tower Defense · Auto Battler

Legend Creatures(传奇生物)
Shared: Auto Battler · Strategy · 2D

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

Dungeon Warfare
Shared: Strategy · Tower Defense · 2D

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

Rise to Ruins
Shared: Tower Defense · Strategy · Pixel Graphics

Oaken Tower
Shared: Strategy · Auto Battler · 2D