Games like Grym Wonder
Games like Grym Wonder include Vampire Survivors, Halls of Torment, BALL x PIT, Death Must Die, and Skul: The Hero Slayer. We matched them by the tags players give Grym Wonder on Steam (Action, Action Roguelike, Arcade, Roguelike, and 2D): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · 2D

Halls of Torment
Shared: Action Roguelike · Action · Roguelike

BALL x PIT
Shared: Action · Arcade · Action Roguelike

Death Must Die
Shared: Action Roguelike · Action · Pixel Graphics

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike

Megabonk
Shared: Action Roguelike · Roguelike · Action

Enter the Gungeon
Shared: Action Roguelike · Roguelike · Pixel Graphics

Hero Siege
Shared: Action Roguelike · Pixel Graphics · Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Pixel Graphics

Dead Cells
Shared: Action Roguelike · Roguelike · 2D

Rogue Legacy
Shared: Action Roguelike · Roguelike · Action

Boneraiser Minions
Shared: Action Roguelike · Pixel Graphics · 2D

Dungreed
Shared: Action Roguelike · Action · Roguelike

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action

Noobs Want to Live
Shared: Action · Roguelike · Action Roguelike

Soulstone Survivors
Shared: Action Roguelike · Roguelike · Action

Sephiria
Shared: Action Roguelike · Roguelike · Action

Hades
Shared: Action Roguelike · Action · Roguelike

Brotato
Shared: Roguelike · Action Roguelike · Singleplayer

Risk of Rain (2013)
Shared: Action Roguelike · Roguelike · Action

Seraph's Last Stand
Shared: Action Roguelike · 2D · Roguelike

Hades II
Shared: Action · Roguelike · Action Roguelike

Black Myth: Wukong
Shared: Action · Action RPG · Combat

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Action