Eat less then 500 calories a day.
Let's see what happens.
Keep it up for 1 week.
Halo essentially invented "mainstream" console FPS.
It's always funny to see PC gamers play halo for the first time. The reaction's almost always the same- "wait... why does everyone like this game?"
What? No it didn't. At all.
What did then? Goldeneye? Doom? Something else?