Games like Slayer Of Sin
Games like Slayer Of Sin include Hollow Knight, Katana ZERO, Blasphemous, Skul: The Hero Slayer, and Dead Cells. We matched them by the tags players give Slayer Of Sin on Steam (Singleplayer, 2D Platformer, Demons, Dark, and Metroidvania): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · Singleplayer

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

Blasphemous
Shared: Metroidvania · Dark Fantasy · Pixel Graphics

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

Dead Cells
Shared: Metroidvania · Singleplayer · Pixel Graphics

Castlevania: Belmont's Curse
Shared: 2D Platformer · Metroidvania · Action RPG

Grim Dawn
Shared: Action RPG · Hack and Slash · Singleplayer

Hollow Knight: Silksong
Shared: Metroidvania · Singleplayer · Platformer

ENDER LILIES: Quietus of the Knights
Shared: Metroidvania · Singleplayer · Dark Fantasy

Salt and Sanctuary
Shared: Metroidvania · Dark Fantasy · Platformer

SANABI
Shared: 2D Platformer · Singleplayer · Pixel Graphics

Celeste
Shared: 2D Platformer · Singleplayer · Platformer

Pizza Tower
Shared: 2D Platformer · Singleplayer · Platformer

The Messenger
Shared: Metroidvania · Platformer · 2D Platformer

Wolcen: Lords of Mayhem
Shared: Singleplayer · Action RPG · Hack and Slash

Castlevania Dominus Collection
Shared: 2D Platformer · Metroidvania · Action RPG

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

SHINOBI: Art of Vengeance
Shared: 2D Platformer · Singleplayer · Metroidvania

Dust: An Elysian Tail
Shared: Metroidvania · Platformer · Singleplayer

Diablo® IV
Shared: Action RPG · Hack and Slash · Singleplayer

ENDER MAGNOLIA: Bloom in the Mist
Shared: Singleplayer · Metroidvania · Action RPG

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

Blasphemous 2
Shared: Metroidvania · 2D Platformer · Pixel Graphics

Rogue Legacy
Shared: Singleplayer · Platformer · Metroidvania