Valve is obsessed with your thumb

Live near New York, Chicago, Los Angeles, Seattle, Miami, Phoenix, Dallas, Minneapolis, or the San Francisco Bay Area? Good. Now go seek out Left 4 Dead 2-related outdoor advertisement and snap a picture of yourself doing something creative next to the billboards, bus ads, or whatever you can find.

Do you even need a reason for doing this? Fine, here’s one: Valve will be giving out a custom “infected” Xbox 360 to the best participant, and the 25 runners-up get signed copies of Left 4 Dead 2.

Supposedly, the Gabe Newell will be looking over the entries. Trust us, that’s one man you do not want to let down under any circumstance. You’d better hurry, because the deadline for the “Dude! Where’s My Thumb Contest 2” is this Sunday.