Games like Shujaa
Games like Shujaa include CULTIC, HROT, Warhammer 40,000: Boltgun, DUSK, and ULTRAKILL. We matched them by the tags players give Shujaa on Steam (Boomer Shooter, Singleplayer, FPS, Old School, and Difficult): closest matches first, and among equally close ones the better-known games.

CULTIC
Shared: Boomer Shooter · FPS · Old School

HROT
Shared: Boomer Shooter · FPS · Singleplayer

Warhammer 40,000: Boltgun
Shared: Boomer Shooter · FPS · Old School

DUSK
Shared: Boomer Shooter · FPS · Old School

ULTRAKILL
Shared: Boomer Shooter · FPS · Singleplayer

Call of Duty®
Shared: FPS · Singleplayer · Shooter

BioShock Infinite
Shared: FPS · Singleplayer · Action

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

DOOM + DOOM II
Shared: FPS · Boomer Shooter · Action

Quake
Shared: FPS · Singleplayer · Action

Serious Sam: Siberian Mayhem
Shared: Boomer Shooter · Action · Shooter

DOOM
Shared: FPS · Action · Shooter

Black Mesa
Shared: FPS · Singleplayer · Action

Half-Life 2
Shared: FPS · Singleplayer · Action

Battlefield™ 1
Shared: FPS · Singleplayer · Action

Ion Fury
Shared: Boomer Shooter · FPS · Old School

DOOM Eternal
Shared: FPS · Action · Singleplayer

Trepang2
Shared: Singleplayer · FPS · Shooter

Battlefield™ 2042
Shared: FPS · Singleplayer · Shooter

Selaco
Shared: FPS · Boomer Shooter · Shooter

SharpShooter3D
Shared: Boomer Shooter · FPS · Action

Wolfenstein: The New Order
Shared: FPS · Singleplayer · Action

SUPERHOT
Shared: FPS · Action · Singleplayer

Turbo Overkill
Shared: Boomer Shooter · FPS · Action