Now it's time to get inside Chief Irons's office.
Leave the file room and board the twisting corridor.
There are about 2 to 3 super Lickers in this area so you need to use caution if you want to slip and slide through these pests.
Now let's go to Floor 2 of the Main Hall.
Hopefully by using this guide, your clear time should be in between 1:30-1:45 for expert players, and a time range of 1:50-2:00 for beginners.
Quickly grab the Rocket Launcher and make sure that Auto-Aiming is turned on because as with any weapon, you can always miss.