Lost Treasure of the Inca Warrior

Second Life isn't really a game but you can play games in it.  One of the best game makers in SL is MadPea Games, creators of such recent in-world hits as Room 326 and most recently The Lost Treasure of the Inca Warrior.

A friend and I recently played it, questing through a mysterious cave full clues, gems and deathtraps.  To play you buy an add on HUD that guides you through the immersive story with prizes from inworld vendors including clothes, temples and full avatars.

My pictures from our adventure were posted on Madpea's flickerstream with one of them winning pic of the day.