Games like Grim Horde
Games like Grim Horde include Vampire Survivors, Halls of Torment, Death Must Die, Skul: The Hero Slayer, and Megabonk. We matched them by the tags players give Grim Horde on Steam (Action, Roguelite, Action Roguelike, Bullet Hell, and Villain Protagonist): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Halls of Torment
Shared: Roguelite · Action Roguelike · Bullet Hell

Death Must Die
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Megabonk
Shared: Action Roguelike · Roguelite · Bullet Hell

Soulstone Survivors
Shared: Roguelite · Action Roguelike · Bullet Hell

Hades
Shared: Roguelite · Action Roguelike · Action

Hades II
Shared: Action · Roguelite · Action Roguelike

BALL x PIT
Shared: Action · Roguelite · Bullet Hell

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Roguelite · Bullet Hell

Hero Siege
Shared: Action Roguelike · Action RPG · Action

Dead Cells
Shared: Action Roguelike · Roguelite · Roguelike

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

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Roguelike

Magicraft
Shared: Roguelite · Action Roguelike · Bullet Hell

Nuclear Throne
Shared: Action Roguelike · Action · Roguelike

Heroes of Hammerwatch II
Shared: Action Roguelike · Action · Action RPG

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

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelike

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

Dungreed
Shared: Action Roguelike · Roguelite · Action

UnderMine
Shared: Roguelite · Action Roguelike · Action

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Roguelite · Bullet Hell

暖雪 Warm Snow
Shared: Roguelite · Action Roguelike · Roguelike