'The Game' is a very simple game. The aim of 'The Game' is essentially to not remember you are playing it.
When you remember 'The Game', you have lost.
By reading this, you have lost 'The Game'.
ILTG is sometimes said, standing for 'I Lost The Game'.
After a few moments of silence, Kenny suddenly said "I lost the game".
Roy typed IRTG on MSN after losing the game.