Games like Mortal Sin
Games like Mortal Sin include Hades, Hades II, Slasher's Keep, The Binding of Isaac: Rebirth, and Moonlighter. We matched them by the tags players give Mortal Sin on Steam (First-Person, Action Roguelike, Dungeon Crawler, Hack and Slash, and RPG): closest matches first, and among equally close ones the better-known games.
Hades
Shared: Action Roguelike · Hack and Slash · Indie
Hades II
Shared: Hack and Slash · Action Roguelike · Action
Slasher's Keep
Shared: Action Roguelike · First-Person · Dungeon Crawler
The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · Dungeon Crawler
Moonlighter
Shared: Hack and Slash · Dungeon Crawler · Action Roguelike
Death Must Die
Shared: Action Roguelike · RPG · Hack and Slash
Halls of Torment
Shared: Action Roguelike · Roguelite · Dark Fantasy
Delver
Shared: First-Person · Dungeon Crawler · Action Roguelike
Path of Exile
Shared: Hack and Slash · Dungeon Crawler · Dark Fantasy
Grim Dawn
Shared: Hack and Slash · Dungeon Crawler · RPG
Wolcen: Lords of Mayhem
Shared: Hack and Slash · RPG · Action
UnderMine
Shared: Action Roguelike · Dungeon Crawler · RPG
Heroes of Hammerwatch II
Shared: Action Roguelike · RPG · Dungeon Crawler
Megabonk
Shared: Action Roguelike · Indie · Roguelite
Cinderia
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler
Gunfire Reborn
Shared: Roguelite · Action Roguelike · Indie
VOIN
Shared: Action Roguelike · Hack and Slash · First-Person
Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie
Children of Morta
Shared: Hack and Slash · Action Roguelike · RPG
Garden of Witches
Shared: Action Roguelike · Hack and Slash · Action
The Binding of Isaac
Shared: Action Roguelike · Indie · Roguelike
Skul: The Hero Slayer
Shared: Action Roguelike · Indie · Action
Path of Exile 2
Shared: Hack and Slash · RPG · Dungeon Crawler
Soulstone Survivors
Shared: Action Roguelike · Roguelite · RPG