Pixel Force: Left 4 Dead is a retro "de-make" created by Eric Ruth Games offering a 2D take on Left 4 Dead, Valve's Zombie shooter. There are screenshots, and there's a gameplay video on the YouTube showing what to expect. Word is: "Lovingly recreated in a fashion that would have been acceptable in 1986 for the Nintendo Entertainment System, this de-make stands as the flagship title of the upcoming Pixel Force series from Eric Ruth Games. Go alone, or invite a friend for 2 player co-op against the zombie apocalypse in all 4 of the original game campaigns. 2 difficulties and all 4 of the survivors make a glorious 8-bit appearence [sic], complete with first and second tier weapons scattered along your path to escape." Thanks ricin, who is supplying a another mirror and a Torrent. Another download mirror is on AtomicGamer.