User blog comment:Lasifer/What could have been....F.E.A.S.T. Concept Art/@comment-2149911-20120406024337/@comment-422690-20120406031442

A simple Google search using their new image search engine - go to the actual picture and copy-paste the link into the "Search by Image" function. It comes up with many links, dating from 2007 and earlier, each art originating from a different site. Some of the more prominent ones are shown below

"Cover":

One of the soldiers:

The guy with the axe:

The one that's now his av:

The "tinyurl" ones are the Google hit page.