This would be a port/remake of the old ut`99 Map, dm-IceToxin by Anton "MaxModule" Wiegert. You would have to know the original to understand why you cannot go outside the walls of the complex. The original did not let you outside the complex either.
This is my first map, so hopefully I'll get some decent feedback. The shape is simple, which leads to constant battle. The height of the map creates a lot of Z-axis fighting, especially with lots of bots.