The Long Way Around - Develop a Capture the Flag map where the flags are within 512 units from each other but have no immediate connections between the two areas.
VRADical - Spend 1 hour in the VRAD section of the compiling time.
The One Free Man - Set one spawn point 1024 units from any other.
Candy for Breakfast - Amount of Halloween candy health kits exceeds spawn points in the map.
Derailed - Set 8 func_tracktrain points 128 units away from a prop_static, prop_dynamic, etc.
Enter the Void - Develop a map using only textures you have made.