Spelunky is a rather innovative game. The Original version reminded me heavily of Secret Agent when it came out - with instant death on spikes or a lose of a valuable hitpoint when you got hit. However, the random level generation helped to keep things fresh on each new run - and the permadeath helped to make you start new runs. Getting the HD version, you get the original game and more. It has local coop, more enemies and zones, and even a few new fun items and modes to play around with. This is definitely worth buying as well for the improved graphics.
