Games like Germinal
Games like Germinal include Celeste, SANABI, Super Meat Boy, Katana ZERO, and Skul: The Hero Slayer. We matched them by the tags players give Germinal on Steam (Precision Platformer, Action, Pixel Graphics, Atmospheric, and Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Pixel Graphics · Platformer

SANABI
Shared: Pixel Graphics · Action · 2D Platformer

Super Meat Boy
Shared: Precision Platformer · Platformer · Pixel Graphics

Katana ZERO
Shared: Action · Pixel Graphics · Platformer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Indie

VVVVVV
Shared: Precision Platformer · Pixel Graphics · Platformer

Jump King
Shared: Precision Platformer · Pixel Graphics · Action

Hollow Knight
Shared: Platformer · Singleplayer · Atmospheric

Thomas Was Alone
Shared: Precision Platformer · Platformer · 2D Platformer

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

Downwell
Shared: Precision Platformer · Pixel Graphics · Platformer

Gravity Circuit
Shared: Action · Pixel Graphics · Platformer

Ambidextro
Shared: Precision Platformer · Action · Pixel Graphics

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

Planet of Lana
Shared: Action · Atmospheric · 2D Platformer

Broforce
Shared: Action · Pixel Graphics · Platformer

Rogue Legacy
Shared: Platformer · Action · Indie

Owlboy
Shared: Pixel Graphics · Platformer · Indie

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

Rain World
Shared: Atmospheric · Pixel Graphics · Platformer

OneShot
Shared: Pixel Graphics · Atmospheric · Indie

Mark of the Ninja
Shared: Platformer · Action · Indie

MO:Astray
Shared: Action · Pixel Graphics · Indie

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