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

Death Must Die
Shared: Action Roguelike · Roguelite · RPG

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

Brotato
Shared: Action Roguelike · Bullet Heaven · Bullet Hell

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

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

Hades
Shared: Action Roguelike · Roguelite · Action

Hades II
Shared: Roguelite · Action Roguelike · Action

Conquest Dark
Shared: Bullet Heaven · Action Roguelike · Roguelite

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Nova Drift
Shared: Action Roguelike · Roguelite · Bullet Hell

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

Magicraft
Shared: Action Roguelike · Roguelite · Bullet Hell

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

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

Hero Siege
Shared: Action Roguelike · RPG · Action RPG

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

BALL x PIT
Shared: Roguelite · Action Roguelike · Action

Sephiria
Shared: Action Roguelike · Roguelite · RPG

God Of Weapons
Shared: Action Roguelike · RPG · Roguelite

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Bullet Hell