I believe you are half right Dargon. The Unofficial Challenge started because there was no Official Game Challenge. CGtalk had challenges for high poly, and 2D art. The Unofficial Challenges made it to #4 I think, before CGtalk added it to the Official challenge. There were two Official Game Art Challenges. I found it difficult to finish those entries, since the guidelines were not intended for game assets, and honestly, not great ideas. They did bring some great art work from some members.
Then the Alienware and MachineFlesh challenges, with no room for Game Artist. Since then, the Unofficial Challenge has once again been the place to compete and learn. Game Art is and interesting genre. You can have those who are just getting started and know little about the key points of game design. Then you have those who are professionals with skills in high poly and texturing who serve as masters to the novice, not to mention tough competition.
So how about we get this thing started soon, eh? Unique Armed Vehicles with Pilots is it?
My suggestion: Keep the guidelines loose so many people can participate.