Games like Rasant
Games like Rasant include BALL x PIT, Cyberhunt, Sky Force Reloaded, 20 Minutes Till Dawn, and Planes, Bullets and Vodka. We matched them by the tags players give Rasant on Steam (Top-Down Shooter, Bullet Hell, Shoot 'Em Up, Adventure, and Action): closest matches first, and among equally close ones the better-known games.

BALL x PIT
Shared: Bullet Hell · Action · Top-Down Shooter

Cyberhunt
Shared: Action · Adventure · Shoot 'Em Up

Sky Force Reloaded
Shared: Shoot 'Em Up · Bullet Hell · Top-Down Shooter

20 Minutes Till Dawn
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up

Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Action

Bit Blaster XL
Shared: Bullet Hell · Shoot 'Em Up · Action

Escape From Duckov
Shared: Adventure · Top-Down Shooter · Action

Nova Drift
Shared: Bullet Hell · Shoot 'Em Up · Arcade

TouHou Makuka Sai ~ Fantastic Danmaku Festival
Shared: Bullet Hell · Adventure · Action

LUFTRAUSERS
Shared: Bullet Hell · Action · Shoot 'Em Up

Bot Vice
Shared: Top-Down Shooter · Bullet Hell · Shoot 'Em Up

Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Action

DoDonPachi Resurrection
Shared: Top-Down Shooter · Bullet Hell · Shoot 'Em Up

Goobies
Shared: Top-Down Shooter · Bullet Hell · Casual

Commando Collection
Shared: Bullet Hell · Action · Shooter

State of Anarchy: Master of Mayhem
Shared: Top-Down Shooter · Bullet Hell · Action

RADical ROACH Remastered
Shared: Action · Adventure · Casual

Exit the Gungeon
Shared: Bullet Hell · Adventure · Action

Vampire Survivors
Shared: Bullet Hell · Casual · Action

Relic Hunters Zero: Remix
Shared: Top-Down Shooter · Action · Adventure

Ikaruga
Shared: Bullet Hell · Shoot 'Em Up · Action

Chippy
Shared: Bullet Hell · Top-Down Shooter · Shoot 'Em Up

Distant Space 2
Shared: Action · Adventure · Shoot 'Em Up

WOWOWOW KORONE BOX
Shared: Bullet Hell · Shoot 'Em Up · Top-Down Shooter