This game is great, I still play it on multi-player occasionally. Watch out though the competition is hot.
The single player game was brilliant as you find out you don't kill everyone you come across as you can perform small missions for them for cash or items. Of course most of them can be executed if you wish afterwards.
Only thing that is disappointing is the lack of bots in multi-player, however there are mods out that fix that so no real problem there.