Doodle or Die game: doodleordie.com/
This is probably one of my favorite games. It starts of with a drawing or a description, then someone draw the description or describe the drawing. Yeah, that sounds about right. Pretty fun and addicting. Especially when you come across other great artists. Theres a lot of chain breakers, haters and trolls too. Just report them, and over time, they go away. I still have a lot of fun drawing though, so its not a big deal to me. I often get things I wouldn't normally draw, so its great for drawing exercise and a creative challenge.
Here is my profile and doodles: doodleordie.com/profile/the-no…
If only I could spend as much time drawing something in Photoshop. Instead of a 520x390 picture with horrible tools. Oh well.