Later versions added a good Masterson clone as a playable character. You encountered Masterson (whose first name was David here, and he was a Sergeant) who is eventually revealed to be a project created by Horzine and serves as the final boss (there was no Patriarch in this version).
The earliest versions of the mod featured a story mode where you played a lone soldier after the outbreak. In this version, the characters were part of the Disaster Response Force. Killing Floor originally existed as a mod, which had it's own set of characters, some of which returned with new appearances in the full release of Killing Floor. 1 Killing Floor Mod Playable Characters.
