Left 4 Dead is mostly fun when played cooperatively and the game will
fulfill your wish of being caught in a Zombie Apocalypse from both
perspectives with tons of guns and hordes of Zombies at your disposal.
Unpredictable & relentless enemies make it imperative to have human
teammates in harder difficulty modes, but you can't complain about
killing zombies alone either. The game also offers a variety of gameplay
modes which will keep you interested for a while.