Glitch is a well-written, free-to-play, super-social game developed by Flickr co-founder Stewart Butterfield and his team at Tiny Speck (they have the best team page I've ever seen). The game was released in late September and there's a great story about Butterfield today in Wired:
"He wanted to build a game that was different from anything else he had played. He wanted to start a company to build that game and then make it available to everyone in the world for free. He wanted to push the boundaries of how people play games together."
I only played a few hours, but like Glitch because it isn't about killing baddies. Instead you level up by learning new things and exploring new territory. One big way to do this is by cooking and drink-making, which you can learn to do in steps, acquiring the right tools and recipes as you go along. Cocktails, for example, will boost your mood and energy, but you probably already know that. So, a few cocktails from the game:
Slow Gin Fizz
Wine of the Dead