Games like Trigger Dungeon
Games like Trigger Dungeon include Pizza Tower, Super Meat Boy, Celeste, SANABI, and Katana ZERO. We matched them by the tags players give Trigger Dungeon on Steam (Action, Platformer, 2D Platformer, Precision Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Pizza Tower
Shared: 2D Platformer · Platformer · Cartoony

Super Meat Boy
Shared: Platformer · Precision Platformer · 2D Platformer

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

SANABI
Shared: Action · 2D Platformer · Pixel Graphics

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Geometry Dash
Shared: 2D · Precision Platformer · Platformer

Downwell
Shared: Precision Platformer · Platformer · Action

Jump King
Shared: Precision Platformer · Platformer · Action

Broforce
Shared: Action · Platformer · 2D

Skul: The Hero Slayer
Shared: Action · 2D · Platformer

The Messenger
Shared: Platformer · Action · 2D

Ambidextro
Shared: Action · Precision Platformer · 2D Platformer

The End Is Nigh
Shared: Platformer · Precision Platformer · Action

Super Meat Boy Forever
Shared: Action · Platformer · Precision Platformer

Webbed
Shared: 2D Platformer · Platformer · Pixel Graphics

Gravity Circuit
Shared: Action · Platformer · 2D

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Pixel Graphics

Guacamelee! Super Turbo Championship Edition
Shared: Platformer · Action · 2D

Grapple Dog
Shared: Platformer · Action · 2D Platformer

Rayman® Origins
Shared: Platformer · 2D · Action

BlazBlue Entropy Effect
Shared: Action · Platformer · 2D

Cuphead
Shared: Platformer · 2D · Action

Hollow Knight
Shared: Platformer · 2D · Indie