Carnalley
This map seriously favors mouse players... the ability to turn on a dime will keep you alive more than any other skill, here. Four towers, with door locks on the inside, are surrounded by open alleyways. Weapons are in the towers, ammo is outside... so you can't stay safe forever. Some secrets remove even the advantage of the well-stocked tower-dweller... this is a really well-thought-out map.
Levels in map "Carnalley":
Carnalley Medium