Games like Gelatinous: Humanity Lost
Games like Gelatinous: Humanity Lost include SANABI, Hollow Knight, Pizza Tower, Sonic Origins, and Shovel Knight: Treasure Trove. We matched them by the tags players give Gelatinous: Humanity Lost on Steam (Action, 2D Platformer, Adventure, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · 2D Platformer · Adventure

Hollow Knight
Shared: Platformer · 2D · Adventure

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

Sonic Origins
Shared: Action · 2D Platformer · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Adventure

Celeste
Shared: 2D Platformer · Platformer · Indie

Katana ZERO
Shared: Action · Platformer · 2D Platformer

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

Dust: An Elysian Tail
Shared: Action · Platformer · Adventure

The Messenger
Shared: Platformer · Action · 2D

Hollow Knight: Silksong
Shared: 2D · Platformer · Indie

Narita Boy
Shared: Action · Adventure · Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Platformer · Adventure

ANTONBLAST
Shared: 2D Platformer · Action · 2D

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

NINJA GAIDEN: Ragebound
Shared: Action · 2D Platformer · Platformer

Ori and the Will of the Wisps
Shared: Platformer · Action · Adventure

Reventure
Shared: Adventure · Multiple Endings · 2D

Rogue Legacy 2
Shared: Action · Platformer · Adventure

Five Nights at Freddy's: Into the Pit
Shared: Adventure · 2D · Action

Gravity Circuit
Shared: Action · Platformer · 2D Platformer

UFO 50
Shared: Action · 2D · Indie

VVVVVV
Shared: Platformer · 2D Platformer · Indie

Out There Somewhere
Shared: Platformer · Adventure · Action