Once you get the super gravity gun, enable the ' changelevel ' code to go to the desired level. Get super gravity gun in any levelĮnable the ' map d3_citadel_03.bsp' code. Locate the 'sv_unlockedchapters' line and change its value to '15'. Use a text editor to edit the 'config.cfg' file in the '\hl2\cfg' directory.
Note: This procedure involves editing a game file create a backup copy of the file before proceeding.