Games like Xalvorynthium
Games like Xalvorynthium include Vampire Survivors, Nova Drift, Deep Rock Galactic: Survivor, Pass the Fear, and Nordic Ashes: Survivors of Ragnarok. We matched them by the tags players give Xalvorynthium on Steam (Action Roguelike, Strategy, Arena Shooter, Bullet Hell, and Action): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arena Shooter

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

Pass the Fear
Shared: Action Roguelike · Bullet Hell · Roguelite

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

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

Brotato
Shared: Action Roguelike · Bullet Hell · Arena Shooter

BALL x PIT
Shared: Action · Action Roguelike · Bullet Hell

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

Megabonk
Shared: Action Roguelike · Bullet Hell · Roguelite

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

Time Wasters
Shared: Action Roguelike · Bullet Hell · Arena Shooter

Glyphica: Typing Survival
Shared: Action Roguelike · Arena Shooter · Bullet Hell

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

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Action

Rocket Rats
Shared: Action Roguelike · Bullet Hell · Roguelite

Roboquest
Shared: Action Roguelike · Roguelite · Shooter

Star of Providence
Shared: Action Roguelike · Bullet Hell · Roguelite

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

FatalZone
Shared: Action Roguelike · Bullet Hell · Arena Shooter

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Roguelite

SNKRX
Shared: Action Roguelike · Arena Shooter · Roguelite

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Action