Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. Locate the "user.cfg" file in the game folder. If it is not present, copy the "ip.cfg" file from the "\help" folder to the game directory and rename it to "user.cfg". Use a text editor to edit the "user.cfg" file. Add the following entries to the file:
undead gun_degrade_rate 0 no_spawn
This allows the game to be played in God mode with weapons that do not break and monsters that do not respawn.