Games like Grim Quest - Old School RPG
Games like Grim Quest - Old School RPG include Darkest Dungeon® II, Darkest Dungeon®, Iratus: Lord of the Dead, Fear & Hunger 2: Termina, and Vampire Survivors. We matched them by the tags players give Grim Quest - Old School RPG on Steam (RPG, Roguelite, Dungeon Crawler, Text-Based, and Dark Fantasy): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon® II
Shared: Roguelite · Dungeon Crawler · Turn-Based Tactics

Darkest Dungeon®
Shared: Dungeon Crawler · RPG · Dark Fantasy

Iratus: Lord of the Dead
Shared: RPG · Roguelite · Dark Fantasy

Fear & Hunger 2: Termina
Shared: RPG · Dark Fantasy · Dungeon Crawler

Vampire Survivors
Shared: Roguelite · 2D · RPG

Salt and Sanctuary
Shared: RPG · Dark Fantasy · Souls-like

Hades II
Shared: Roguelite · RPG · Dungeon Crawler

Mewgenics
Shared: Roguelite · Turn-Based Tactics · RPG

DARK SOULS™: REMASTERED
Shared: RPG · Dark Fantasy · Souls-like

King Arthur: Knight's Tale
Shared: RPG · Dark Fantasy · Turn-Based Tactics

ELDEN RING
Shared: RPG · Dark Fantasy · Souls-like

Halls of Torment
Shared: Roguelite · Dark Fantasy · RPG

Lunacid
Shared: Dungeon Crawler · RPG · Dark Fantasy

Hades
Shared: Roguelite · RPG · Dungeon Crawler

Legend of Keepers: Prologue
Shared: Dungeon Crawler · RPG · Roguelite

Slice & Dice
Shared: Dungeon Crawler · RPG · Roguelite

Path of Exile 2
Shared: RPG · Dark Fantasy · Dungeon Crawler

Trials of Fire
Shared: Roguelite · Dungeon Crawler · Turn-Based Tactics

DARK SOULS™ II: Scholar of the First Sin
Shared: RPG · Dark Fantasy · Souls-like

Death Must Die
Shared: Roguelite · RPG · 2D

DARK SOULS™ III
Shared: RPG · Dark Fantasy · Souls-like

The Binding of Isaac: Rebirth
Shared: Dungeon Crawler · Roguelike · Indie

UnderMine
Shared: Roguelite · RPG · Dungeon Crawler

Witchfire
Shared: Roguelite · RPG · Dark Fantasy