I haven't been able to find a source on this, but it was posted on Danbooru a few years ago by one スラッシュ, who linked to this site (sadly now down, apparently) as the original source.
A t-shirt design from LowRez.de. Classic!
And on a related note, someone ported Tetris to an oscilloscope.
"Urban Mushrooms", by flickr user SHUN(iamtekn).
"Future Fantasy VII" by deviantart user Minor-Interest. Yeah, I'm a nerd.
I could keep going, but there are trees to trim and halls to deck and whatnot. See ya in the new year.