I've just finished playing the SP campaign w/o having done any MP except the game that Gary introduces you to it. I'm reluctant to try it honestly. After being exposed to communities in WoW, LoL, and Dota, I'm very 20 times bitten 100 times shy when it comes to PvP. I understand that there are no more gold chests in SP, but what about the challenges? Do those have gold chests? At some point I'll try to get a single win in MP to see if I like it and get a reward, but at this point, what do I need more for as a SP? I've beaten the game. Do the challenges give you the gear to help you finish the challenges? If so, that's probably enough for me.