The monsterhunt gametype is the best to be compared to Assault with monsters on the other team, you can play it with the RPG mod but you'll need special maps for those... Some Monsterhunt maps are remakes of AS maps, It's like an combination of ASsault and INVasion.. Pretty fun tho some mappers seem...
Aww c'mon you know what I mean
imp flies to wall gets stuck INSIDE, way to hight to reach with melee
no fallback that ends the round for a new wave,
which means the game will be STUCK, and you have to start all over again