The Norbert (10G) - Create a track and name it Antanuga Inc.
The Architect (20G) - Share a track that took at least 50 hours to create.
What happens if I... (10G) - (mystery achievement) Unlock by reaching the end of the complexity meter.
Way of the Zero (49G) - Zero Fault every track in the game.
Needle in a Haystack (1G) - Find a special EGG.
(please incorporate some type of achievement to get more people on the riddle bandwagon!)