Games like CASTILLO: Shattered Mirrors
Games like CASTILLO: Shattered Mirrors include DUSK, Warhammer 40,000: Boltgun, CULTIC, Forgive Me Father, and Prodeus. We matched them by the tags players give CASTILLO: Shattered Mirrors on Steam (Boomer Shooter, Retro, Collectathon, Shooter, and FPS): closest matches first, and among equally close ones the better-known games.

DUSK
Shared: Boomer Shooter · Retro · FPS

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

CULTIC
Shared: Boomer Shooter · Shooter · FPS

Forgive Me Father
Shared: Boomer Shooter · FPS · Retro

Prodeus
Shared: Boomer Shooter · Retro · FPS

HROT
Shared: Retro · Boomer Shooter · FPS

Selaco
Shared: Shooter · Boomer Shooter · FPS

Turbo Overkill
Shared: Boomer Shooter · FPS · Shooter

Project Warlock
Shared: Boomer Shooter · Retro · FPS

Ion Fury
Shared: Boomer Shooter · Retro · FPS

Nightmare Reaper
Shared: Boomer Shooter · Retro · FPS

Forgive Me Father 2
Shared: Boomer Shooter · FPS · Lovecraftian

SharpShooter3D
Shared: Boomer Shooter · FPS · Shooter

DOOM 64
Shared: Retro · FPS · Boomer Shooter

ULTRAKILL
Shared: Boomer Shooter · FPS · Retro

VLADiK BRUTAL
Shared: Shooter · FPS · First-Person

Devil Daggers
Shared: FPS · Retro · Shooter

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

Ready or Not
Shared: Shooter · FPS · Horror

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

Half-Life 2
Shared: FPS · Shooter · Action

Hedon Bloodrite
Shared: Retro · FPS · Shooter

Left 4 Dead 2
Shared: FPS · Shooter · Horror

Zortch
Shared: Boomer Shooter · FPS · Shooter