How to create mutator in Killing Floor

Simply step-by-step instruction about hoe to make your 1st mutator.

Firstly we need Filling Floor SDK with ucc compiler. Download here.

1. First of all make subloder named with your mutator name in kf game folder then make Classes subfolder in mutator folder. E.g.:

g:\Games\KF\NewMut\Classes

2. Next make file with .uc extension in Classes folder. E.g. Mut1.uc

3. Open with notepad killingfloor.ini file in System subfolder of game root folder. Find line [Editor.EditorEngine] and add after one this

EditPackages=YourMutatorFolderName

In this case

EditPackages=NewMut

4. Open file from 2nd step with notepad and insert this code to one



class Mut1 extends Mutator;

defaultproperties { GroupName="KFNewMut" FriendlyName="New mutator" Description="Simple mutator" }

Pay attension that it should be same name after class word as in file from step 2. Also value of GroupName variable should start with KF lettrs. Save file.

5. Compile the mutator. To do that make bat file in System subfolder. E.g. make.bat. Open it with notepad and insert code below:



del NewMut.u

ucc make

del steam_appid.txt

Code explanations. 1st line delet our compiled mutator if it is. If it not be deleted then new code can’t be added to new compiled version. 2nd line run ucc utility (ucc.exe file must be placed to game subfolder System) for all mutators compiling. 3nd line delete file created by ucc. It prevent normal game run.

6. Save and run file from step 5. Now it has 2new files in System subfolder: