I saw ProJared do a mini-review on it and got curious enough to try it. It's ADDICTING and a major time-killer. Why? I'm not sure. Maybe it's the same kind of curiosity/exploration/finding new things concepts that made ST, Zelda, etc. so great. IF you haven't played it, it has a lot of aspects: a lot of different skills to upgrade, curiosities to research, different environment types... BUT... everything you do is permanent. Yes, it's one of those games.