Games like Unhallowed Survivors
Games like Unhallowed Survivors include Halls of Torment, Vampire Survivors, Megabonk, Death Must Die, and Soulstone Survivors. We matched them by the tags players give Unhallowed Survivors on Steam (Bullet Heaven, Action Roguelike, Roguelite, Dark Fantasy, and Top-Down): closest matches first, and among equally close ones the better-known games.

Halls of Torment
Shared: Action Roguelike · Roguelite · Dark Fantasy

Vampire Survivors
Shared: Action Roguelike · Roguelite · 2D

Megabonk
Shared: Bullet Heaven · Action Roguelike · Roguelite

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

Soulstone Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

暖雪 Warm Snow
Shared: Action Roguelike · Roguelite · 2D

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Heaven · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Action

UnderMine
Shared: Action Roguelike · Roguelite · Action

Yet Another Zombie Survivors
Shared: Bullet Heaven · Action Roguelike · Roguelite

BALL x PIT
Shared: Roguelite · Action Roguelike · Action

Dead Cells
Shared: Action Roguelike · Roguelite · 2D

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

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

Brotato
Shared: Action Roguelike · Bullet Heaven · Singleplayer

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Heaven

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

Spirit Hunters: Infinite Horde
Shared: Bullet Heaven · Action Roguelike · Roguelite

Rogue Legacy
Shared: Action Roguelike · Action · 2D

Rogue: Genesia
Shared: Bullet Heaven · Action Roguelike · Roguelite

Sephiria
Shared: Action Roguelike · Roguelite · Action

The Spell Brigade
Shared: Bullet Heaven · Roguelite · Action Roguelike

Jotunnslayer: Hordes of Hel
Shared: Bullet Heaven · Action Roguelike · Roguelite

Hades II
Shared: Roguelite · Action Roguelike · Action