Games like Soul Machine
Games like Soul Machine include Brotato, Vampire Survivors, Enter the Gungeon, Megabonk, and Crab Champions. We matched them by the tags players give Soul Machine on Steam (Bullet Hell, Action Roguelike, Vehicular Combat, Roguelike, and Looter Shooter): closest matches first, and among equally close ones the better-known games.

Brotato
Shared: Bullet Hell · Roguelike · Action Roguelike

Vampire Survivors
Shared: Bullet Hell · Action Roguelike · Roguelike

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

Megabonk
Shared: Action Roguelike · Roguelike · Bullet Hell

Crab Champions
Shared: Action Roguelike · Looter Shooter · Roguelike

Nuclear Throne
Shared: Action Roguelike · Roguelike · Bullet Hell

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelike

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

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

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · Arena Shooter

TerraTech Legion
Shared: Action Roguelike · Bullet Hell · Vehicular Combat

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

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

Relic Hunters Zero: Remix
Shared: Looter Shooter · Action Roguelike · Bullet Hell

20 Minutes Till Dawn
Shared: Bullet Hell · Action Roguelike · Top-Down Shooter

Pathogenic
Shared: Bullet Hell · Roguelike · Action Roguelike

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

Noobs Are Coming
Shared: Action Roguelike · Bullet Hell · Roguelike

Tiny Rogues
Shared: Bullet Hell · Action Roguelike · Roguelike

Arms of God
Shared: Action Roguelike · Bullet Hell · Arena Shooter

SYNTHETIK: Legion Rising
Shared: Action Roguelike · Top-Down Shooter · Roguelike

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

Soulstone Survivors
Shared: Action Roguelike · Bullet Hell · Roguelike

R.I.P. - Reincarnation Insurance Program
Shared: Action Roguelike · Bullet Hell · Looter Shooter