Games like Crystal Plague
Games like Crystal Plague include Hades, Hades II, Gothic 1 Remake, Minecraft Dungeons, and Moonlighter. We matched them by the tags players give Crystal Plague on Steam (Action Roguelike, Exploration, Atmospheric, Roguelite, and Class-Based): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Roguelite · Hack and Slash

Hades II
Shared: Roguelite · Action Roguelike · Hack and Slash

Gothic 1 Remake
Shared: Exploration · Atmospheric · RPG

Minecraft Dungeons
Shared: Hack and Slash · Dungeon Crawler · Exploration

Moonlighter
Shared: Roguelite · Action Roguelike · Hack and Slash

Hogwarts Legacy
Shared: Exploration · Fantasy · Atmospheric

Cinderia
Shared: Action Roguelike · Roguelite · Hack and Slash

Moon Hunters
Shared: Action Roguelike · Roguelite · Exploration

Minecraft Dungeons II
Shared: Exploration · Hack and Slash · Dungeon Crawler

Death Must Die
Shared: Action Roguelike · Roguelite · Hack and Slash

Shape of Dreams
Shared: Action Roguelike · Roguelite · Hack and Slash

The Witcher 3: Wild Hunt — Remastered
Shared: Atmospheric · RPG · Fantasy

Grim Dawn
Shared: Hack and Slash · Isometric · Dungeon Crawler

Black Myth: Wukong
Shared: Atmospheric · RPG · Action

Heroes of Hammerwatch II
Shared: Action Roguelike · Roguelite · Dungeon Crawler

FATE: Reawakened
Shared: Action Roguelike · Exploration · Dungeon Crawler

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Roguelite · Hack and Slash

A Plague Tale: Requiem
Shared: Exploration · Atmospheric · Action-Adventure

God of War Ragnarök
Shared: Hack and Slash · Action-Adventure · Action

Curse of the Dead Gods
Shared: Action Roguelike · Roguelite · Isometric

Dead Cells
Shared: Action Roguelike · Roguelite · Hack and Slash

UnderMine
Shared: Action Roguelike · Roguelite · Dungeon Crawler

God of War
Shared: Hack and Slash · Action · Exploration

Diablo® IV
Shared: Hack and Slash · Isometric · Dungeon Crawler