Games like Dimension Defenders
Games like Dimension Defenders include PUBG: BATTLEGROUNDS, Dungeon Defenders, Bloons TD 6, Orcs Must Die! 2, and The Riftbreaker. We matched them by the tags players give Dimension Defenders on Steam (Strategy, Tower Defense, Top-Down, Survival, and Action): closest matches first, and among equally close ones the better-known games.

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Multiplayer

Dungeon Defenders
Shared: Tower Defense · Strategy · Survival

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Orcs Must Die! 2
Shared: Tower Defense · Strategy · Action

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

Dungeon Defenders: Awakened
Shared: Tower Defense · Strategy · Singleplayer

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

Aliens: Dark Descent
Shared: Strategy · Action · Top-Down

Don't Starve Together
Shared: Survival · Adventure · Multiplayer

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

Sanctum 2
Shared: Tower Defense · Strategy · Action

Bloons TD 5
Shared: Strategy · Tower Defense · Action

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

Terraria
Shared: Survival · Adventure · Multiplayer

Cultivation Tales
Shared: Survival · Action · Online Co-Op

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Top-Down

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

Raft
Shared: Survival · Multiplayer · Adventure

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

The Escapists
Shared: Strategy · Singleplayer · Action

This War of Mine
Shared: Survival · Strategy · Singleplayer

Once Human
Shared: Survival · Action · Multiplayer

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

Palworld
Shared: Survival · Multiplayer · Online Co-Op