Prey was great, I didn't play much of the multi-player though, as it wasn't anything special. It was one of those early current generation games that was really well made, it's definitely a classic, but very few still play it.
I remember having the demo before buying it and playing it through again and again because it seemed so good. The game was quite emotional too.
I think the sad thing with multi-player games is that it has to be popular at the time, otherwise you'll find it difficult. Though, for example, The Summoner I found even after a few years of existence, there was still a couple of groups of people who were playing, it worked to my advantage because I got a load of neat items they all had spare.

Though the multi-player on that wasn't special either, but fun.
I'm looking forward to hearing of the sequel that was so blatantly hinted in the ending. There's the odd bit of news hear and there about Prey 2, but the first was a 3D Realms project, so we might hear hits and misses, though it would seem a different company is working on Prey 2 instead, though some of the same old 3D Realms folk are in the team:
http://uk.pc.ign.com/articles/860/860398p1.html
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