Games like Frebbventure
Games like Frebbventure include Celeste, SANABI, Super Meat Boy, Thomas Was Alone, and Katana ZERO. We matched them by the tags players give Frebbventure on Steam (Precision Platformer, Side Scroller, 2D Platformer, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

SANABI
Shared: 2D Platformer · Action · Story Rich

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

Thomas Was Alone
Shared: Side Scroller · Platformer · Precision Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · 2D

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

VVVVVV
Shared: Precision Platformer · Platformer · 2D Platformer

Geometry Dash
Shared: Precision Platformer · 2D · Platformer

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Broforce
Shared: 2D · Action · Platformer

Blasphemous 2
Shared: 2D Platformer · Side Scroller · 2D

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

Prince of Persia The Lost Crown
Shared: 2D Platformer · Side Scroller · Precision Platformer

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

Hollow Knight
Shared: Platformer · 2D · Indie

Gravity Circuit
Shared: Platformer · Action · 2D

Jump King
Shared: Precision Platformer · Platformer · 2D

Mark of the Ninja
Shared: Platformer · 2D · Side Scroller

Dust: An Elysian Tail
Shared: Platformer · Action · 2D

Lone Fungus
Shared: 2D Platformer · Precision Platformer · Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · 2D · Side Scroller

Gal Guardians: Demon Purge
Shared: 2D Platformer · Side Scroller · Platformer

Ambidextro
Shared: Precision Platformer · 2D Platformer · Action