Games like Orcalypse
Games like Orcalypse include Nova Drift, Bit Blaster XL, BALL x PIT, LUFTRAUSERS, and Vampire Survivors. We matched them by the tags players give Orcalypse on Steam (Arena Shooter, Shoot 'Em Up, Bullet Hell, PvE, and Shooter): closest matches first, and among equally close ones the better-known games.
Nova Drift
Shared: Shoot 'Em Up · Bullet Hell · Arena Shooter
Bit Blaster XL
Shared: Shoot 'Em Up · Bullet Hell · Shooter
BALL x PIT
Shared: Bullet Hell · Arcade · Shoot 'Em Up
LUFTRAUSERS
Shared: Bullet Hell · Arcade · Shoot 'Em Up
Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics
Planes, Bullets and Vodka
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Chippy
Shared: Arena Shooter · Bullet Hell · Shoot 'Em Up
ZeroRanger
Shared: Shoot 'Em Up · Bullet Hell · Arcade
SNKRX
Shared: Arena Shooter · Shoot 'Em Up · Arcade
Ikaruga
Shared: Shoot 'Em Up · Bullet Hell · Arcade
DoDonPachi Resurrection
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Kill The Crows
Shared: Arena Shooter · Arcade · Action
DRAINUS
Shared: Shoot 'Em Up · Shooter · Bullet Hell
Deep Rock Galactic: Survivor
Shared: Bullet Hell · Arena Shooter · PvE
Touhou Kinjoukyou ～ Fossilized Wonders.
Shared: Shoot 'Em Up · Bullet Hell · Shooter
Mushihimesama
Shared: Shoot 'Em Up · Bullet Hell · Arcade
X Invader
Shared: Arena Shooter · Shoot 'Em Up · Bullet Hell
Commando Collection
Shared: Bullet Hell · Shooter · Arcade
Revolution Ace
Shared: Shoot 'Em Up · Bullet Hell · Shooter
METAL SLUG
Shared: Shoot 'Em Up · Arcade · 2D
Halls of Torment
Shared: Bullet Hell · Pixel Graphics · Arcade
ARC Raiders
Shared: PvE · Shooter · Post-apocalyptic
Star Saviors
Shared: Shoot 'Em Up · Bullet Hell · Arcade
Huntdown
Shared: Shooter · Shoot 'Em Up · Pixel Graphics