Just saw this over at slick deals and picked it up.

Dead Island (PC) is on sale for $9.99 at new egg (free shipping/no tax).  Not sure if this is just a one day deal or what exactly, so check this out asap if you've been wanting this.  I believe this is the retail packaging, but you can likely register it through steam and download if that's your preference. 

Here's a link to the deal directly:  http://www.newegg.com/Product/Product.aspx?Item=N82E16832220034

Here's a link to where I found the deal on slickdeals:  http://slickdeals.net/f/3861084-Dead-Island-PC-9-99-with-free-shipping