Games like Mage Fort
Games like Mage Fort include Overcooked! 2, Brawlhalla, Orcs Must Die! 2, Stick Fight: The Game, and Gang Beasts. We matched them by the tags players give Mage Fort on Steam (Action, Tower Defense, Indie, Local Co-Op, and Tutorial): closest matches first, and among equally close ones the better-known games.

Overcooked! 2
Shared: Local Co-Op · Multiplayer · Indie

Brawlhalla
Shared: Multiplayer · Controller · Action

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

Stick Fight: The Game
Shared: Action · Multiplayer · Local Multiplayer

Gang Beasts
Shared: Action · Multiplayer · Indie

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

Bopl Battle
Shared: Action · Multiplayer · 4 Player Local

Magicka
Shared: Action · Co-op · Multiplayer

Pummel Party
Shared: Multiplayer · 4 Player Local · Online Co-Op

Move or Die
Shared: Action · Multiplayer · Indie

Castle Crashers®
Shared: Online Co-Op · Local Co-Op · 4 Player Local

Unrailed!
Shared: Local Co-Op · Action · Multiplayer

SpeedRunners
Shared: Indie · Action · Multiplayer

Overcooked
Shared: Local Co-Op · Indie · Multiplayer

Broforce
Shared: Action · Local Co-Op · Indie

Awesomenauts
Shared: Action · Indie · Multiplayer

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

Sanctum 2
Shared: Tower Defense · Action · Indie

Bloons TD 5
Shared: Tower Defense · Action · Multiplayer

FORCED: Slightly Better Edition
Shared: Action · Local Co-Op · Indie

Dungeon Defenders
Shared: Tower Defense · Multiplayer · Online Co-Op

Deathtrap
Shared: Tower Defense · Action · Indie

Out of Space
Shared: Indie · Local Co-Op · Multiplayer

Rivals of Aether II
Shared: Indie · Action · Multiplayer