The profanity pack is an addon that gives the Goo Balls rather more mischievous voices. It will be available exclusively to people who pre-ordered the game before its official release date.

It is not available yet and 2D Boy have not announced when it will be released.

There is an ongoing contest for suggestions in the 2D Boy forum. The top 5 suggestions selected by 2D Boy will win a signed boxed version of World of Goo.