Zelda Majora Mask

[Bridge]

What you could do is create a CS based solely around one section of the game. If you're insistent on basing it off Majora's Mask a few areas come to mind, like the Snowhead Temple for example. It's totally doable in Amnesia with some design changes.

EDIT: Why on earth would you skip to the ending? The game is not about the ending, it's about the kafkaesque atmosphere and the poignant storyline (plus the best music in video game history). It's very difficult, but just persevere. It's worth it.