da_ramp is an indoor map with (if you can guess), ramps! It also features a walkway stretching through the entire map. There are no props, doors, or any of that pansy stuff. Just you, a gun, and some bots.
You must be saying, "Charles, you fool! This map doesn't follow the DAB map style! There are no complicated structures, props, or stairs!" Well, you're right. This map is inspired by Day Of Defeat: Source and Team Fortress 2 custom maps.