Games like Mortal Trap Dungeon
Games like Mortal Trap Dungeon include Celeste, VVVVVV, Super Meat Boy, Shovel Knight: Treasure Trove, and SANABI. We matched them by the tags players give Mortal Trap Dungeon on Steam (Adventure, 2D Platformer, Exploration, Pixel Graphics, and Old School): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Pixel Graphics · 2D Platformer · Precision Platformer

VVVVVV
Shared: Pixel Graphics · 2D Platformer · Platformer

Super Meat Boy
Shared: 2D Platformer · Pixel Graphics · Platformer

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Adventure · Retro

SANABI
Shared: Pixel Graphics · 2D Platformer · Adventure

Downwell
Shared: Pixel Graphics · 2D Platformer · Precision Platformer

Webbed
Shared: 2D Platformer · Pixel Graphics · Exploration

Rain World
Shared: Exploration · Pixel Graphics · Adventure

Sonic Origins
Shared: 2D Platformer · Adventure · Pixel Graphics

UFO 50
Shared: Pixel Graphics · Retro · Adventure

Lone Fungus
Shared: Adventure · 2D Platformer · Pixel Graphics

Terraria
Shared: Adventure · Pixel Graphics · Exploration

Reventure
Shared: Adventure · Pixel Graphics · Exploration

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Pixel Graphics · Exploration

Jump King
Shared: Adventure · Pixel Graphics · Precision Platformer

Narita Boy
Shared: Adventure · Retro · Pixel Graphics

Alex Kidd in Miracle World DX
Shared: 2D Platformer · Pixel Graphics · Precision Platformer

FEZ
Shared: Pixel Graphics · Exploration · Adventure

Haiku, the Robot
Shared: Adventure · Exploration · Pixel Graphics

The Messenger
Shared: Retro · Pixel Graphics · Platformer

Leap Year
Shared: Exploration · 2D Platformer · Precision Platformer

ANIMAL WELL
Shared: Exploration · Pixel Graphics · Adventure

Volgarr the Viking
Shared: Adventure · Platformer · Retro

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer