Necklace of Skulls

Learning of the disappearance of your twin brother in the trackless desert, you resolve to set out and discover his fate. Leaving the hub of your elaborate Mayan civilization far behind, your quest takes you to the lost jungle cities, across mountains and seas, and even to the baleful depths of the underworld. If you are luck enough to survive the treacherous desert journey, you must still confront the wizard called Necklace of Skulls in a deadly contest whose stakes are nothing less than your own soul.

An unofficial adaptation of the 1993 Virtual Reality Adventures book by Dave Morris