Okay, I got a good one.

I don't know if any of you have seen "The Cube". It was a movie about a bunch of people in a giant cube, made up of smaller cubes, some of different colors, and some with traps in them, and the cubes were in constant motion, so the cube was ever-changing.
We could get a definite size for each cube, then each person could make their own couple of cubes, and fill them each with their own kind of trap, and then we could disperse them anomgst normal cubes, thus making a big maze.

• Map a scene out of a movie of your choice. Anybody could do this -- mappers using HL1 or HL2. You have your choice of making the map small or large and can pay attention to as much detail as you want without restrictions.
  
• Recreate a scene out of movie, but make it (for the lack of a better word) dynamic. This would be great for those seeking to learn more about entity usage and how they are able to interact with another. Plus, those of us who are meaning to try out faceposer could get a chance to. Those who only have HL1 could have a separate competition just for them.
  
• Single Player campaign with a central theme thought up by the community (for those who have troubles coming up with a story).
  
• A template map is made, setting up boundaries in which the contestants must work in. It is up to one's choice to make the space whatever one wishes it to be, as long as it stays in the space provided.