It's known for its challenging puzzles and surreal imagery.

There are a number of particularly challenging and occasionally frustrating puzzles for the gamer.

Conor's tone was thoughtful, as if he struggled with some challenging puzzle.

He said the game was a bit too difficult, with very challenging puzzles.

A definitely challenging puzzle he leaves for the cops to figure, such is the mind of the criminal genius.

Find items of importance, solve challenging puzzles, and be prepared for terrifying surprises.

It was a richly detailed and atmospheric world with challenging puzzles.

Often a list of the hidden words is provided, but more challenging puzzles may let the player figure them out.

This is essentially an adventure story with a couple of challenging puzzles built into it.

Finding a galaxy's mass is a challenging puzzle for scientists.