Excerpt: SOE is essentially split into two pieces: Revolution (of course) and Khaos. Revolution is a story mode in the loosest sense of the word, because there is no real "story',...
Conclusion: Because the PS2 version came out so long ago don't write SOE off as one of the bog standard cross platform ports that crop up all too regularly.
Pros: new Xbox only features, insane crowds and the framerate never drops, large range of weapons, multiplayer is fun, nice and violent
Cons: no system link for deathmatch, nice and violent, no driveable vehicles