Soldier of Fortune 2
Here is another great DM map from -=BluE=-*Chubbz*. This map is DM and TDM game types only, and has the sniper game game play right at the center of it. There are plenty of good sniper points all
over this map and some good height to it as well. The map is based above water, so falling off the high buildings is not too much of a problem :) Go give it a try and the author some feed back.