I really hate Multiplayer Achievements. Why can't game devs just let us enjoy multiplayer without the worry of achievements in it that will force us to "boost" or play in ways we otherwise wouldn't? I know people will say to just ignore those things... But, it's kind of hard for a completionist to do that.
So... I just thought up a magic system that I would love to use in my next game. It's based on the Thaumcraft mod of Minecraft. Distill objects into liquid magic, then combine them as a spell. It's too bad I don't even have a demo out for my current game -_-"
So... while cooking my supper, I loaded up Mass Effect 3 Multiplayer. It's amazing to me that this game had to be out for a few years before players figured out how to play the game right by reviving teammates and actually being at the extraction point.