mvm_deserted is a Mann vs Machine map heavily inspired by Team Fortress 2's "expert" difficulty PvE levels. I sketched this level on paper, and have built it in Hammer. While running playtests for the map was much more difficult than it had been for the PvP stages I've made, the process of creating a "mission" (the set of robot waves that players fight against) was an awesome learning experience.
Check out the level page HERE
Read the design postmortem HERE