From The TimeSplitters Wiki

In Ufopia, there is a wall were you can jump through. When you jump through, you go into the hallway below it. But your screen is in the sky. You can't see anything, but your able to walk through Ufopia. It also makes you untouchable but you can still shoot everyone else.

Steps

• First get on the Ufos in the main area with a whole in the ground.
• Jump to the Ufo that is near the window that has a hallway underneath it.
• Look at the wall above the hallway and walk through it.
• If you did it right, you would see the sky.

Modes

It works in any Mode.