Games like Overdeveloped: Requiem
Games like Overdeveloped: Requiem include Katana ZERO, SANABI, Celeste, ICEY, and The Vagrant. We matched them by the tags players give Overdeveloped: Requiem on Steam (Side Scroller, 2D Platformer, Hack and Slash, Beat 'em up, and Platformer): closest matches first, and among equally close ones the better-known games.

Katana ZERO
Shared: 2D Platformer · Platformer · Action

SANABI
Shared: 2D Platformer · Action · Story Rich

Celeste
Shared: 2D Platformer · Platformer · Female Protagonist

ICEY
Shared: Side Scroller · Hack and Slash · Female Protagonist

The Vagrant
Shared: Side Scroller · Female Protagonist · 2D

Blasphemous 2
Shared: 2D Platformer · Side Scroller · Hack and Slash

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Hack and Slash

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

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

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

Afterimage
Shared: 2D Platformer · Side Scroller · Female Protagonist

Bladed fury
Shared: Hack and Slash · Side Scroller · Female Protagonist

Gravity Circuit
Shared: Platformer · 2D Platformer · Action

NINJA GAIDEN: Ragebound
Shared: 2D Platformer · Side Scroller · Platformer

Broforce
Shared: Action · Platformer · 2D

Shank
Shared: Beat 'em up · Side Scroller · Action

Timespinner
Shared: Side Scroller · 2D Platformer · Female Protagonist

Eastern Exorcist
Shared: Side Scroller · Hack and Slash · Action

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

Shank 2
Shared: Beat 'em up · Side Scroller · Action

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

Iconoclasts
Shared: Female Protagonist · Platformer · Action

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

Pizza Tower
Shared: 2D Platformer · Platformer · Indie