Games like Super Indiemania
Games like Super Indiemania include Celeste, SANABI, Super Meat Boy, Shovel Knight: Treasure Trove, and Skul: The Hero Slayer. We matched them by the tags players give Super Indiemania on Steam (Side Scroller, Old School, Difficult, Indie, and Supernatural): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Difficult · Indie · Pixel Graphics

SANABI
Shared: Pixel Graphics · Indie · Singleplayer

Super Meat Boy
Shared: Difficult · Indie · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: Indie · Pixel Graphics · Difficult

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

Blasphemous 2
Shared: Difficult · Side Scroller · Pixel Graphics

Blasphemous
Shared: Pixel Graphics · Indie · Difficult

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

Geometry Dash
Shared: Difficult · Singleplayer · Indie

The Binding of Isaac: Rebirth
Shared: Indie · Difficult · Pixel Graphics

Hollow Knight
Shared: Difficult · Indie · Singleplayer

Katana ZERO
Shared: Pixel Graphics · Indie · 2D Platformer

Hollow Knight: Silksong
Shared: Difficult · Indie · Singleplayer

Volgarr the Viking
Shared: Difficult · Indie · Old School

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · Pixel Graphics · Difficult

NINJA GAIDEN: Ragebound
Shared: Side Scroller · Pixel Graphics · Indie

DEADBOLT
Shared: Indie · Pixel Graphics · Difficult

Bloodstained: Curse of the Moon
Shared: Side Scroller · Pixel Graphics · Singleplayer

Rain World
Shared: Difficult · Indie · Pixel Graphics

Jump King
Shared: Difficult · Indie · Pixel Graphics

VVVVVV
Shared: Indie · Pixel Graphics · Difficult

Gravity Circuit
Shared: Indie · Pixel Graphics · Singleplayer

Kaze and the Wild Masks
Shared: Old School · 1990's · Difficult

Angry Video Game Nerd Adventures
Shared: Indie · Difficult · Pixel Graphics