Games like Space Vomit
Games like Space Vomit include Vampire Survivors, Megabonk, The Binding of Isaac: Rebirth, Enter the Gungeon, and The Binding of Isaac. We matched them by the tags players give Space Vomit on Steam (Action, Action Roguelike, Roguelike, Bullet Hell, and Shooter): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Megabonk
Shared: Action Roguelike · Roguelike · Bullet Hell

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Replay Value

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

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

Hades
Shared: Action Roguelike · Action · Roguelike

Nova Drift
Shared: Bullet Hell · Action Roguelike · Arcade

Brotato
Shared: Roguelike · Action Roguelike · Bullet Hell

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action

BALL x PIT
Shared: Action · Bullet Hell · Roguelike

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

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

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

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

Spelunky
Shared: Action Roguelike · Roguelike · Indie

Dead Cells
Shared: Roguelike · Action Roguelike · Replay Value

Gunfire Reborn
Shared: Roguelike · Action · Action Roguelike

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

Hades II
Shared: Action · Roguelike · Action Roguelike

Realm of the Mad God Exalt
Shared: Roguelike · Bullet Hell · Action Roguelike

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

Risk of Rain (2013)
Shared: Action Roguelike · Roguelike · Action

Tiny Rogues
Shared: Action Roguelike · Bullet Hell · Replay Value

Crab Champions
Shared: Action Roguelike · Roguelike · Bullet Hell