Can you explain what's so special about Steam achievements? Beside the size of the e-penis ?
Achievements inform you what you missed in the game. So, it's a feature about how you succeeded your game, how you could have done better.
It seems being a missing feature in GOG version, so the GOG game is not the complete full one.
You added achievements to the game. Are they steam only achievments, or will they also be in the standalone version from GoG?
Petri, Tue Mar 27 2012: The achievements use Steamworks so they are not available in the standalone version."