Games like Ascending Inferno
Games like Ascending Inferno include Celeste, SANABI, Super Meat Boy, Jump King, and A Difficult Game About Climbing. We matched them by the tags players give Ascending Inferno on Steam (Precision Platformer, Physics, Difficult, Action, and Adventure): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · Platformer

SANABI
Shared: Action · Story Rich · Adventure

Super Meat Boy
Shared: Precision Platformer · Difficult · Platformer

Jump King
Shared: Precision Platformer · Difficult · Adventure

A Difficult Game About Climbing
Shared: Difficult · Precision Platformer · Adventure

Getting Over It with Bennett Foddy
Shared: Difficult · Physics · Singleplayer

Hollow Knight
Shared: Difficult · Platformer · Adventure

Hollow Knight: Silksong
Shared: Difficult · Platformer · Singleplayer

Katana ZERO
Shared: Action · Platformer · Story Rich

VVVVVV
Shared: Precision Platformer · Platformer · Difficult

Portal 2
Shared: Platformer · Singleplayer · Story Rich

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

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Difficult · Adventure

Tomb Raider Game of the Year
Shared: Action · Adventure · Story Rich

Geometry Dash
Shared: Difficult · Precision Platformer · Platformer

Downwell
Shared: Precision Platformer · Platformer · Action

Noita
Shared: Physics · Difficult · Pixel Graphics

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

Rusted Moss
Shared: Platformer · Action · Precision Platformer

Skul: The Hero Slayer
Shared: Action · Difficult · Platformer

Rise of the Tomb Raider™
Shared: Action · Adventure · Singleplayer

Peaks of Yore
Shared: Physics · Difficult · Adventure

Nine Sols
Shared: Difficult · Action · Platformer

I wanna be the Creator
Shared: Action · Platformer · Precision Platformer