The 10x10 Project is a modest set of ten BOOM-compatible maps made as mapping exercises in which I restricted myself to using ten stock textures and ten stock FLATs in each (with some universal textures such as switches, doors, DOORTRAK, lights, etc.). Pistol starts are intended but I won't put a gun to your head. Starts out at Plutonia difficulty then starts worshipping Killer5 and Insane Gazebo later on (but still easier than their stuff). In addition there is a secret map that will probably be unpopular.