Yes, it's a DOOM 2 .wad, but with awesome Mega Man graphics:
http://kotaku.com/5660452/mega-man-8-bit-deathmatch-released-its-free (http://kotaku.com/5660452/mega-man-8-bit-deathmatch-released-its-free)
It has online multiplayer too, I need to put more time into it.
totally downloaded, i will play metal man style once im not SICKKKKKK OH GOD ACHES AND HEADACHES