What game do you wish you had more time to play?

One of the few negatives inherent in the MMO explosion of the past few years is that there's simply not enough time to play everything. We have more choices today than at any point in the genre's short history, and this means that quality games often fall by the wayside.

Perpetuum is a gem of a sci-fi sandbox from an indie outfit called Avatar Creations, and it's a game that I regret not having more time to play. Its second anniversary slipped by me this year (an oversight that was thankfully corrected by a sharp-eyed reader). What about you? Is there a particular game that you really wish you had time to play?

TH