Chris Matthews is a senior artist at Crytek UK, the studio formerly known as Free Radical (Timesplitters). The art you're about to see, then, has not only some Crytek stuff such as Crysis, but also some art from the developer's cancelled Battlefront III project.
Having been at Free Radical/Crytek UK since 2005, he's now working on Crytek's Homefront sequel.
You can see more of Chris' art at his personal site.
To see the larger pics in all their glory (or so you can save them as wallpaper), right-click on them below and select "open in new tab".