Forced micro-transaction? I don't know what you mean. I guess while you can play it in single person, it's a much better experience in multiplayer because there's puzzles that you solve that can only be done with at least another player.
A buddy and I played about 3 hours so far, and I really like it. Controls are awesome, locales are pretty varied (I love dungeon crawlers that don't take place ENTIRELY in dungeons) and everything runs fluid. Got on and set up an omlimne multiplayer game with no problem at all, real quick-like.The only gripe I have is the story is cliche and a bit lacking, but it's par for the course for these games. Also, I have this feeling it could be a short game, but I could be wrong on that. We'll see. Damn fun though.
I'm still trying to figure out what you mean by micro-transaction. Do you mean how you can either buy the game with one character for 800 points or the game with all 3 for 1200? If so, I thought that is a nice service on their part. Or maybe you're talking about how you can buy in-game gold for real money? I bought some... 40,000 gold for 80 MSP (a buck), but you don't really need it, there's plenty of in-game gold to go around.