Walter: It can be played for free at VogClub where it's called Narde (Fuega). It's definitely a different way of thinking.

There's another version called Crazy Narde (Gul Bara) in which a double gives you not only the 4 dice values but also every double higher. Rolling a 1-1 can thus give you 84 pips to play with, lol. But in practice you can't use them all and what you don't use your opponent gets. Crazy indeed.

WhiteTower; Thanks. Link fixed.