Okay, so maybe cruising through Abadox while completely invincible is a bit on the easy side. Maybe you want a little bit more of a challenge... but not a whole lot. Okay, we can do that.

First, go to the "PRESS START" screen

Then grab Controller 1 and press Up, Down, Right, Right, Up, Left, Right, Down, Left, Up

Then start your game. Everything will look pretty much normal... until you pause the game and then unpause again.

If you did the code right, when the action starts again, you'll be loaded to the teeth!

And you can do this as many times as you want, which is especially helpful if you accidentally pick up a gun that you don't want.

But you're still very destructible, which adds just enough challenge to keep the game interesting for a while.