Mac users interested in Spelunky hd 1.0 generally download:
Spelunky is a platformer with lots of monsters, items, traps, and secrets. Each time you restart, you'll play a new, randomly-generated set of levels. It will feel fresh and exciting, and you'll have to think on your feet. You'll also be able to play Spelunky with friends at home. There's co-op and deathmatch.