Set in the immediate aftermath of the zombie apocalypse, Left 4 Dead's survival co-op mode lets up to four players blast a path through the swarming zombie hordes and terrifying mutant monsters. Guide your survivors across the rooftops of an abandoned metropolis, through rural ghost towns and pitch-black forests in your quest to escape a devastated Ground Zero crawling with infected enemies.
This will change your L4D car Alarm to the TMNT theme song. the ENTIRE song is there, but it will play as long as the car alarm is active. There is a video of this on youtube. Just search for L4D : Teenage Mutant Ninja Turtle Car Alarm or find me, nsf4848. Hope you enjoy it!