Renamed some soundfiles.
Edited the terrain so that you could extend the energy network to the west.

Edited some names for the sound files.

There will be an infected giant present on the last wave. It's spawn location is random, so you better have some REAL tight defenses.

Some of the buildings now play a sound when you go near them.

Added portraits of the mercs and Merasmus.

Grammatical edits and a change to Heavy's description.

The excavation from the Mann Co. employees also opened up the West area. You can build structures and extend the energy network there now.

The difficulty and score factor has been changed. This doesn't affect the original horde sizes that were implemented, it just changes the score factor.

I've finally found out how to put sound clips in-game. There are a few bits of Engineer, Spy, and a villain.