Games like MergeTD
Games like MergeTD include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Origins - Tower Defense, and Mini Motorways. We matched them by the tags players give MergeTD on Steam (Casual, Strategy, Tower Defense, Grand Strategy, and Board Game): closest matches first, and among equally close ones the better-known games.

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

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

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

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

Mini Motorways
Shared: Strategy · Casual · Minimalist

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

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

Plague Inc: Evolved
Shared: Strategy · Casual · Indie

Dorfromantik
Shared: Casual · Strategy · Board Game

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

Zup! S
Shared: Casual · 2D · Minimalist

Minimalist Tower Defense
Shared: Strategy · Tower Defense · Casual

Hexcells
Shared: Casual · Strategy · Minimalist

Rogue Tower
Shared: Strategy · Tower Defense · Casual

Mini Metro
Shared: Strategy · Casual · Minimalist

Tiny Civilization
Shared: Strategy · Grand Strategy · Board Game

Game Dev Tycoon
Shared: Strategy · Casual · 2D

Hexcells Infinite
Shared: Casual · Strategy · Minimalist

911 Operator
Shared: Strategy · Casual · Indie

Thronefall
Shared: Strategy · Tower Defense · Minimalist

Hearts of Iron IV
Shared: Strategy · Grand Strategy · Tactical

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