This is What the Game Is is a note in Outlast: Whistleblower.

It is acquired by recording a Variant playing basketball with a severed head in the Recreation Area.


This is what the game is
"He's playing alone and losing. That is what the game is.
There is a mathematical proof, if you add 1 + 2 + 3 + 4 + 5 up to infinity, you can arrive at an answer. If you stop shy of infinity, you have an indescribably long number. If you continue all the way to infinity, you arrive at - 1/12. Negative 0.0833333 repeating. I'm losing my grip on things.
I'm thinking about the drive here, 400 miles in a rented truck. The job that shows up just in time to cover our bills, our debts, the insurance. The boys sleeping in the back, nothing but AM radio. Gospel, Country-Western, late night paranoiac talk radio. We sang Patsy Klein songs and laughed at conspiracies of aliens and ghosts. Mile marker numbers passing in the headlights. I don't want to die here."