Don't forget the first half of this month on Xbox Live, all gold members get Dead Island for free! Just go to "Games" then "Browse Games" the select the "Games for Gold" icon usually found in the top right. Hit the download button and you're good to go!
This game was released almost two and a half years ago and received some of the best acclaim for a fun zombie game. This is personally my first time playing through it, and I'm finding it quite enjoyable so far. Definitely great for co-op. Stop waiting around and jump right in!!