Games like MOP Operation Cleanup
Games like MOP Operation Cleanup include Bloons TD 6, Plants vs. Zombies GOTY Edition, Bloons TD 5, Kingdom Rush - Tower Defense, and Ninja Kiwi Archive. We matched them by the tags players give MOP Operation Cleanup on Steam (Action, Casual, Strategy, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Singleplayer · Casual

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Bloons TD 5
Shared: Strategy · Action · Casual

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

Ninja Kiwi Archive
Shared: Casual · Strategy · Action

BEEP
Shared: Platformer · 2D · Action

ShellShock Live
Shared: Strategy · Action · 2D

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

Scribblenauts Unlimited
Shared: Casual · Singleplayer · 2D

Sonic Mania
Shared: Platformer · 2D · Action

DuckTales: Remastered
Shared: Action · Platformer · Casual

Sonic Superstars
Shared: Action · Platformer · Casual

Hollow Knight
Shared: Platformer · 2D · Singleplayer

Geometry Dash
Shared: 2D · Platformer · Singleplayer

Russian Life Simulator
Shared: Action · 2D · Singleplayer

Peggle Deluxe
Shared: Casual · Singleplayer · 2D

Papa's Pizzeria Deluxe
Shared: Casual · Strategy · Action

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

Sonic Origins
Shared: Action · Platformer · Casual

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

Tangy TD
Shared: Action · Strategy · Singleplayer

Ori and the Will of the Wisps
Shared: Platformer · Action · Singleplayer

Game Dev Tycoon
Shared: Strategy · Casual · Singleplayer

Scribblenauts Unmasked: A DC Comics Adventure
Shared: Action · Casual · Strategy