Decent Co-Op/Multiplayer RPGs

Hey strangers!I've just about finished my exams, my brother is coming home for a few weeks over the course of the summer holiday, and we're trying to find decent co-op/multiplayer RPGs to play while he's back. It doesn't make a difference to us whether they're fantasy or sci-fi (or anything, really), just that they have good co-operative gameplay. Ideally, there would have to be a certain element of character customisation (nothing more primitive than, say, Neverwinter Nights).I realise there's plenty out there, but unfortunately we're rather stumped. We've played through Icewind Dale 1 %26 2 as well asNWN1 and NWN2 (inc. expansions). I was quite excited about the concept of KOTOR 1 %26 2 until it became (somewhat painfully) obvious that neither had multiplayer.Also, any decent MMO's with decently lengthy (2 weeks or more) free trials?So, the tl;dr version: Any good co-operative RPGs that you guys would recommend?Thanks in advance folks!Decent Co-Op/Multiplayer RPGs
I know it doesn't meet our requirements but I really think you should go for Baldur's gate IIDecent Co-Op/Multiplayer RPGs
Diablo 2
Baldur's Gate 2
System Shock 2
Hellgate: London
Diablo 2 Lord of Destruction is a great ''play with buddies'' game.