I recognized Mario Brothers, Winter Games, Mega Man, Duck Hunt, Nibbles, Asteroids, Galaga, Moon Patrol, Breakout, but I'm really most impressed about NetHack. I didn't even know that anyone other than me plays NetHack!
.. though, at no point did one of the enemies instakill me with a Wand of Death. So, I guess it wasn't so much like NetHack at all. :)