So, on Hard mode you don't get the Masters? That just plain sucks. Oh, let's defend the castle but you have no upgrades left to fight the immensely strong hordes. Bummer. Let-down for the otherwise nice game
There should definitely be an upgrade "zombie intelligence"-chase down last person on map instead of aimlessly walking in circles in a corner with my 10 brethren
Having a lobby would greatly enhance the experience. I think many people leave because either they haven't joined the room with the right map, or are n't playing with people of the right level/type. Being able to see how many players, the type of classes are playing, and the map from the lobby would quicken the grind of looking for a room with the right map and players. It's been too often that I join a room of 3 people, and left to be the last one because of the leavers, though the quick match option should still be available.
 "GrindCraft"){kind=icon}
 "Goldrush Roulette"){kind=icon}
 "Decision:Medieval"){kind=icon}
 "Hero's Adventure"){kind=icon}
 "Infectonator 2"){kind=icon}
 "Learn to Fly 3"){kind=icon}
 "Skrillex Scary Monsters And Nice Sprites Launchpad"){kind=icon}
 "Flight"){kind=icon}
 "SAS: Zombie Assault 4"){kind=icon}
 "Boxhead: 2Play Rooms"){kind=icon}
 "Drunken Wrestlers"){kind=icon}
 "Angry Gran Run"){kind=icon}
 "Sports Heads: Basketball"){kind=icon}
 "Burnin' Rubber Crash n' Burn"){kind=icon}
 "Learn to Fly 2"){kind=icon}