Games like Orcs Must Die! 3
Games like Orcs Must Die! 3 include HELLDIVERS™ 2, Warhammer 40,000: Space Marine 2, Orcs Must Die! 2, Bloons TD 6, and Orcs Must Die! Deathtrap. We matched them by the tags players give Orcs Must Die! 3 on Steam (Tower Defense, Strategy, Third-Person Shooter, PvE, and Action): closest matches first, and among equally close ones the better-known games.

HELLDIVERS™ 2
Shared: Third-Person Shooter · PvE · Co-op

Warhammer 40,000: Space Marine 2
Shared: Co-op · Third-Person Shooter · Action

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

Bloons TD 6
Shared: Tower Defense · Strategy · Co-op

Orcs Must Die! Deathtrap
Shared: Tower Defense · Co-op · Third-Person Shooter

PUBG: BATTLEGROUNDS
Shared: Third-Person Shooter · Multiplayer · Action

Grand Theft Auto V Legacy
Shared: Action · Multiplayer · Third Person

Resident Evil 5
Shared: Co-op · Action · Third-Person Shooter

Dungeon Defenders
Shared: Tower Defense · Strategy · Multiplayer

Resident Evil 6
Shared: Co-op · Action · Third-Person Shooter

PEAK
Shared: Co-op · Multiplayer · Online Co-Op

ARC Raiders
Shared: PvE · Third-Person Shooter · Multiplayer

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

Risk of Rain 2
Shared: Third-Person Shooter · Co-op · Multiplayer

ELDEN RING NIGHTREIGN
Shared: Co-op · Multiplayer · Online Co-Op

How to Fish
Shared: Co-op · Multiplayer · Online Co-Op

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

Monster Hunter: World
Shared: Co-op · Action · Multiplayer

REMNANT II®
Shared: Co-op · Third-Person Shooter · Action

Marvel Rivals
Shared: Third-Person Shooter · Multiplayer · Action

RV There Yet?
Shared: Co-op · Multiplayer · Online Co-Op

Monster Hunter Wilds
Shared: Co-op · Action · Multiplayer

Plants vs. Zombies: Battle for Neighborville™
Shared: Third-Person Shooter · Multiplayer · Tower Defense

Saints Row: The Third
Shared: Co-op · Third-Person Shooter · Action