Mega Man X3
Sent in by Justin
After beating him in his battle body, you have to race Sigma
up a shaft with lava at your heels and Sigma trying to kill
you. If you live, the game takes over and X runs into a dead
end. Sigma is about to posses X when depending on if you
killed Zero or not it will be Doppler or Zero. If it's Zero he
hits Sigma with his saber, which has an anti-virus in it
(you'll learn why.) But Doppler puts the anti-virus in him.
Then after X escapes you see him standing on a cliff, with
or without Zero. It says the same thing from all the other X
games, except for one thing. "To save mankind he must
destroy Zero. But only time will tell when and why..."