Indonesian artist Machine56 has come up with these pictures of Cerberus troops from the Mass Effect series, making them available as some rather fetching wallpaper fodder.
He's also looking to get them printed up as shirts (the "order form" in this gallery is just a mock-up), which would be great; the same artist came up with an amazing Dead Space hoodie last year that sadly, despite attempts, never got the green light from EA to be sold as official merchandise.
You can check out more of Machine56's stuff at his DeviantArt page below, as well as buy some gear direct from the artist. I actually got a hoodie and shirt last year after seeing the Dead Space piece and they're nice.
Machine56 [DeviantArt]