You can unlock a Cheat called 'I like Deadside Shotguns!' then enable it in the secrets menu! Allows you to use your shotguns in Deadside!!!!
Go to the Wasteland and enter the Temple Of Life. Go to location with the Baton and go to the altars. Go into the 2nd from right alter!
Go to the Cathedral Of Pain and drop down the shaft into the Marcher lava. Go on the top of the spinning blades, then find your way to another shaft that goes down. Drop down and the "Secret Activated" message will appear as you fall.
Not in the PC version..... A shame as its the best secret to unlock!