Games like Chronoseum
Games like Chronoseum include Megabonk, Brotato, Vampire Survivors, Soulstone Survivors, and Hades. We matched them by the tags players give Chronoseum on Steam (Action Roguelike, Roguelite, Bullet Heaven, Singleplayer, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Megabonk
Shared: Action Roguelike · Bullet Heaven · Roguelite

Brotato
Shared: Action Roguelike · Singleplayer · Bullet Hell

Vampire Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

Soulstone Survivors
Shared: Action Roguelike · Bullet Heaven · Roguelite

Hades
Shared: Action Roguelike · Roguelite · Indie

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

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

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

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

Nova Drift
Shared: Roguelite · Action Roguelike · Bullet Hell

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

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

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

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

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

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

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

Boneraiser Minions
Shared: Action Roguelike · Roguelite · Bullet Hell

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Action

Hades II
Shared: Roguelite · Action Roguelike · Action

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

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

Time Wasters
Shared: Action Roguelike · Bullet Heaven · Roguelite

I Am Legion: Stand Survivors
Shared: Action Roguelike · Roguelite · Bullet Hell

