Lore & History

Killing Floor 1 - The Original Classic

Killing Floor 1, also known as KF1, is the original game that launched the entire franchise in 2009. It remains a beloved classic with a dedicated player base.

Killing Floor box art Killing Floor retail box art: "Co-Op Survival Horror".

About Killing Floor 1

The Beginning

Killing Floor 1 started as a mod for Unreal Tournament 2004 before becoming a standalone commercial release. It introduced the wave-based survival formula that would define the series.

Core Gameplay

  • 10 waves of Zeds (adjustable difficulty)
  • 7 unique perks with 6 levels each
  • Wave-based survival - Fight, earn money, buy weapons
  • Boss encounter - Face the Patriarch in final wave
  • Co-op focus - Best played with friends

Why Play KF1 Today?

Unique Features

  • Dark atmosphere - Horror-focused, unlike sequels
  • Classic feel - Simpler, more tactical gameplay
  • Active modding - Thousands of custom maps
  • Community servers - Dedicated servers with unique modes
  • Nostalgia - The game that started it all

Still Active

  • Active player base - People still play regularly
  • Community servers - 24/7 servers available
  • Regular events - Community-organized activities
  • Mod support - Extensive custom content

Perks

Support Specialist perk art Support Specialist, the shotgun and welding perk.

Killing Floor 1 features 7 perks:

  • Berserker - Melee specialist
  • Commando - Assault rifles
  • Support - Shotguns
  • Medic - Healing
  • Sharpshooter - Snipers
  • Demolitions - Explosives
  • Firebug - Flamethrower

System Requirements

Minimum

  • OS: Windows XP/Vista
  • RAM: 1 GB
  • Graphics: 64 MB, DX9 compatible
  • Storage: 2 GB

Where to Buy

Available on:

  • Steam
  • Very affordable
  • Frequently on sale