Games like Crab Kingdom
Games like Crab Kingdom include Bloons TD 6, Mindustry, The Escapists 2, Kingdom Rush 5: Alliance TD, and Plants vs. Zombies GOTY Edition. We matched them by the tags players give Crab Kingdom on Steam (Tower Defense, Underwater, Local Co-Op, Strategy, and 2D): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Tower Defense · Strategy · Multiplayer

Mindustry
Shared: Tower Defense · Strategy · Resource Management

The Escapists 2
Shared: Strategy · Local Co-Op · 2D

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

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Strategy · 2D

Bloons TD 5
Shared: Tower Defense · Strategy · Co-op

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

PixelJunk™ Monsters Ultimate
Shared: Tower Defense · Local Co-Op · Strategy

Cuphead
Shared: Local Co-Op · 2D · Co-op

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

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

Barotrauma
Shared: Underwater · 2D · Co-op

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Co-op

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

Castle Crashers®
Shared: 2D · Local Co-Op · Co-op

Orcs Must Die! 3
Shared: Tower Defense · Strategy · Co-op

Bopl Battle
Shared: Local Co-Op · Strategy · Multiplayer

Awesomenauts
Shared: 2D · Local Co-Op · Multiplayer

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

Factorio
Shared: Resource Management · Strategy · Multiplayer

Risk of Rain Returns
Shared: Local Co-Op · 2D · Controller

Rayman® Origins
Shared: Local Co-Op · 2D · Cartoony

Dungeon Defenders
Shared: Tower Defense · Strategy · Multiplayer

EA SPORTS FC™ 26
Shared: Controller · Local Co-Op · Multiplayer