Are there any guides on how to implement achievements in a game you are releasing on steam? A small publisher is interested in my Mutant Colossus game and they are really keen on adding achievements to the steam release. One of the things I'm interested in is whether or not I can store values on the steam cloud, for things like "kill a certain amount of enemies". I don't want to use an INI file if I can avoid it. As I suspect that might be to easy for players to cheat.
The Steamworks extension looks pretty complicated, any help would be greatly appreciated.