There have been quite a few recently. I just picked up the new issues of Halo, Mass Effect and Deus-Ex this morning. I'll dig them out and take some photos. I've got some old Street Fighter and Mortal Kombat issues as well. The Tokuma Street Fighter series was really good but the Malibu series was god awful.
Here's a link so a website I use which is quite useful for tracking down what comics have been released. There have been quite a few games that have made it into comics over the years.
http://comicbookrealm.com/