You'll find Virtual Villagers 2 on the casual game sites--but don't let that mislead you. This isn't the usual match-three game, but an extremely unusual--and remarkably compelling--game, in which you help an island of primitives survive and thrive. Unusually, the "world" continues when you're not playing--so, Tamagotchi-like, you need to check in every few days to see what's happening and adjust your strategy.
As far as that goes, VV 2 is similar to the original Virtual Villagers--but the newer game adds some twists. Exploring some caves, your original inhabitants come across a new area of the island--where feral children, Lord of the Flies-style (well, not that brutally) need your help to learn the skills necessary for survival.
While fans of the original game will enjoy this continuation, it's also quite accessible to new players--you needn't have played the original to enjoy this one.