Chipotle is giving away free guac and chips . . . but you'll have to play its Guac Hunter game before you can get the coupon. The game is simple (and you don't even have to win!). Basically, try to spot the differences in two photos. Play the game for three rounds, and the guac coupon is yours! Just be sure to use the offer before April 10, else it expires. After a year of E. Coli outbreaks, it appears the company is attempting to pull clientele back through its doors via various coupons. But hey, we're not complaining! Thanks for the free guac, Chipotle.