Heavenly Sword sold what it did cause it was a PS3 exclusive at a time when no dev was taking to learn how to utilize the PS3 for anything. Enslaved just got lost in the release of other games. I personally didn't buy it because I have a lot of games to get through and I don't have the time. Though if I didn't have a lot of games to get through I'm still not to sure I would have bought it; the overall combo system was severely lacking from what I played in the demo so they didn't hook me with its gameplay. I'd only get it for its story. Though why I feel it didn't sell as well as it probably should, I'd have to say it didn't have some kind of useless online for the youngens to get their instant gratification (But that's another thread of discussion).
