Designed as a Dukematch level, Tier Drops consists of an outer hallway and four rooms in the center. These rooms seem to occupy the same space, but because the Build engine allows for non-Euclidean geometry, the rooms do not actually overlap. These rooms also contain holes in the ground that resemble wells. Falling into these wells will land the player in one of the other rooms. The level's name is a reference to this mechanic of dropping from one room to the next.
This level is one giant square, and in each of the four corners of the hallway is a secret. Go to each of the four corners and press the part of the wall atop the raised platform. On each of the four raised platforms, this will open a secret compartment with equipment inside.
- If Duke shoots the Babes in the Delta Room, it will cause Battlelord Sentries to spawn. Although killing Babes often spawns enemies, these are the only Babes in the game to spawn mini-bosses.