Games like RainBullet
Games like RainBullet include ULTRAKILL, Counter-Strike 2, Warhammer 40,000: Boltgun, BRAZILIAN DRUG DEALER 3: I OPENED A PORTAL TO HELL IN THE FAVELA TRYING TO REVIVE MIT AIA I NEED TO CLOSE IT, and AMID EVIL. We matched them by the tags players give RainBullet on Steam (Boomer Shooter, Arena Shooter, FPS, Bullet Hell, and Incremental): closest matches first, and among equally close ones the better-known games.

ULTRAKILL
Shared: Boomer Shooter · FPS · Arena Shooter

Counter-Strike 2
Shared: FPS · Action · Shooter

Warhammer 40,000: Boltgun
Shared: Boomer Shooter · FPS · Action

BRAZILIAN DRUG DEALER 3: I OPENED A PORTAL TO HELL IN THE FAVELA TRYING TO REVIVE MIT AIA I NEED TO CLOSE IT
Shared: Boomer Shooter · Arena Shooter · FPS

AMID EVIL
Shared: Boomer Shooter · FPS · Arena Shooter

Turbo Overkill
Shared: Boomer Shooter · FPS · Action

Bloodshed
Shared: Boomer Shooter · FPS · Bullet Hell

MULLET MADJACK
Shared: Boomer Shooter · FPS · Action

ODDCORE
Shared: Arena Shooter · Boomer Shooter · FPS

Vampire Survivors
Shared: Bullet Hell · Casual · Action

Prodeus
Shared: Boomer Shooter · FPS · Action

DUSK
Shared: Boomer Shooter · FPS · Shooter

Fashion Police Squad
Shared: Boomer Shooter · Arena Shooter · FPS

Devil Daggers
Shared: FPS · Action · Arena Shooter

MOUSE: P.I. For Hire
Shared: FPS · Boomer Shooter · Action

Nova Drift
Shared: Bullet Hell · Arena Shooter · Arcade

Ratz Instagib
Shared: Boomer Shooter · Arena Shooter · FPS

I Am Your Beast
Shared: FPS · Boomer Shooter · Arena Shooter

Anger Foot
Shared: Boomer Shooter · FPS · Action

Tom Clancy's Rainbow Six Siege
Shared: FPS · Shooter · Action

Swarmlake
Shared: FPS · Action · Bullet Hell

PUBG: BATTLEGROUNDS
Shared: FPS · Shooter · Action

HYPER DEMON
Shared: FPS · Arena Shooter · Bullet Hell

CULTIC
Shared: Boomer Shooter · FPS · Action