Games like Peep Invasion
Games like Peep Invasion include Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, Plants vs. Zombies GOTY Edition, and Kingdom Rush Origins - Tower Defense. We matched them by the tags players give Peep Invasion on Steam (Strategy, Casual, Tower Defense, Singleplayer, and 3D): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

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

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

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

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

Rogue Tower
Shared: Strategy · Tower Defense · Casual

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

Plague Inc: Evolved
Shared: Strategy · Singleplayer · Casual

911 Operator
Shared: Strategy · Singleplayer · Casual

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Singleplayer

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

Dungeon Defenders
Shared: Tower Defense · Strategy · Singleplayer

Emberward
Shared: Strategy · Tower Defense · 3D

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

Prime World: Defenders
Shared: Strategy · Tower Defense · Casual

Warstone TD
Shared: Strategy · Tower Defense · Fantasy

Artisan TD
Shared: Strategy · Tower Defense · Tactical

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Singleplayer

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Idle Champions of the Forgotten Realms
Shared: Strategy · Fantasy · Singleplayer

Relic Guardian - Tower Defense
Shared: Strategy · Tower Defense · Casual

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

Thronefall
Shared: Strategy · Tower Defense · 3D

Game Dev Tycoon
Shared: Strategy · Casual · Singleplayer