The Haunted Halls is the seventh level of The Netherworld. The map is the secret map of this episode. The level is unique in its design and very tight. 2 quads, 2 RLs and a Penta make sure it is a fragfeast in multiplayer.
The TDM version of this single player map was made to make it more "playable" for 4on4, making a maplock not so evil. The original version had no escape of a maplock so in this version the teleporters are connected at "Start" and "Exit" and there is a way from GL-room to the path between Tower-RL and RA. Also the Quad at "Exit-Room" is moved to the other side of the lava pit, for easier access to it from the other side and the teleporter there.