Games like Cursed Castle
Games like Cursed Castle include Firework, Outer Wilds, The Exit 8, Inside the Backrooms, and Lorelei and the Laser Eyes. We matched them by the tags players give Cursed Castle on Steam (RPG, Puzzle, Exploration, 3D, and Third Person): closest matches first, and among equally close ones the better-known games.

Firework
Shared: Puzzle · Horror · Psychological Horror

Outer Wilds
Shared: Exploration · Puzzle · Mystery

The Exit 8
Shared: Puzzle · Exploration · 3D

Inside the Backrooms
Shared: Puzzle · Horror · Exploration

Lorelei and the Laser Eyes
Shared: Puzzle · Exploration · Horror

Poppy Playtime
Shared: Puzzle · Horror · Psychological Horror

Murders on the Yangtze River
Shared: Puzzle · Exploration · Adventure

Gothic 1 Remake
Shared: RPG · Exploration · Third Person

MiSide
Shared: Psychological Horror · 3D · Horror

Stray
Shared: Exploration · Puzzle · Adventure

DREDGE
Shared: Exploration · RPG · Adventure

Unheard - Voices of Crime
Shared: Puzzle · RPG · Mystery

Who's Lila?
Shared: Psychological Horror · Horror · Exploration

Fate Seeker II
Shared: RPG · Puzzle · Exploration

INDIKA
Shared: Puzzle · Third Person · Exploration

Hogwarts Legacy
Shared: RPG · Exploration · Third Person

WILL: A Wonderful World / WILL:美好世界
Shared: RPG · Puzzle · Exploration

The Room 4: Old Sins
Shared: Puzzle · Mystery · Exploration

Blue Prince
Shared: Puzzle · Exploration · Mystery

We Were Here Forever
Shared: Puzzle · 3D · Exploration

SILENT HILL 2
Shared: Psychological Horror · Horror · Psychological

The Painscreek Killings
Shared: Exploration · Puzzle · Mystery

Escape the Backrooms
Shared: Horror · Psychological Horror · Exploration

Tainted Grail: The Fall of Avalon
Shared: RPG · Exploration · Third Person