Successfully complete the game under the difficult difficulty setting.
Cheat mode
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "eib.ini" file in the "system" folder in the game directory. Look for the "[Engine.GameInfo]" heading, then enter the line "bCheatsEnabled=True" below it. Then, look for the "[Engine.Console]" heading and change the "ConsoleKey=0" line to "ConsoleKey=192". Then, press ~ during game play to display the console window. Enter one of the following codes to activate the corresponding cheat function. Also, there is no confirmation that a code has been entered correctly.
Note: You must reset the cheats every time you play (i.e., retype everything with the exception of the line "bCheatsEnabled=True").You must move it under "[Engine.Console]" and must re-enter "ConsoleKey=192" in order for the console and the cheats to work properly in the game.
Note: If you change the "default.ini" file as well as "bia.ini", you do not have to change it back when you restart your game; it simply rewrites "bia.ini" from "default.ini".
Effect - Code
God mode - god
Flight mode - fly
Disable flight and no clipping mode - walk
All weapons - allweapons
No clipping Mode - ghost
Extra ammunition - allammo
Togle invisibility - invisible <0 or 1>
Kils everything - killall
Get all items - loaded
Remove all items - unloaded
Select map- loadspmap