More glitch than cheat
You need invincibility equipped to do this. Okay, on quartu swim through the pool of death. At the end there is some nanotech boxes. Break one open and if you have invincibility from that [you'll be glowing] jump in the pool of electricity. IT WON'T KILL YOU the annoying this is that after that you will hear yourself being electricuted but you won't be hurt. Its weird because everything is faded to near whiteness.
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