Games like Dungeon Defenders
Games like Dungeon Defenders include Bloons TD 6, Dungeon Defenders: Awakened, The Riftbreaker, MONSTER HUNTER RISE, and Enshrouded. We matched them by the tags players give Dungeon Defenders on Steam (Multiplayer, Online Co-Op, Tower Defense, Singleplayer, and Strategy): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Multiplayer · Tower Defense · Online Co-Op

Dungeon Defenders: Awakened
Shared: Multiplayer · Online Co-Op · Singleplayer

The Riftbreaker
Shared: Online Co-Op · Multiplayer · Tower Defense

MONSTER HUNTER RISE
Shared: Online Co-Op · Multiplayer · Character Customization

Enshrouded
Shared: Multiplayer · Online Co-Op · Survival

Dota 2
Shared: Multiplayer · Strategy · Online Co-Op

PUBG: BATTLEGROUNDS
Shared: Multiplayer · Survival · Online Co-Op

Where Winds Meet
Shared: Multiplayer · Singleplayer · Action RPG

Monster Hunter Wilds
Shared: Multiplayer · Online Co-Op · Character Customization

Bloons TD 5
Shared: Tower Defense · Strategy · Multiplayer

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

ELDEN RING
Shared: Multiplayer · Action RPG · Online Co-Op

Valheim
Shared: Online Co-Op · Multiplayer · Survival

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

7 Days to Die
Shared: Multiplayer · Survival · Online Co-Op

Garry's Mod
Shared: Multiplayer · Singleplayer · Online Co-Op

Mount & Blade II: Bannerlord
Shared: Strategy · Multiplayer · Singleplayer

Orcs Must Die! 3
Shared: Tower Defense · Strategy · Multiplayer

Monster Hunter: World
Shared: Multiplayer · Character Customization · Singleplayer

Don't Starve Together
Shared: Multiplayer · Survival · Online Co-Op

Raft
Shared: Multiplayer · Survival · Online Co-Op

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

Counter-Strike 2
Shared: Multiplayer · Online Co-Op · Tactical

Green Hell
Shared: Multiplayer · Online Co-Op · Survival