A virtuosic example of the branching story, you have 3 choices. Build defences, find weapons or get some bros to hangout with.

A game that rewards those who seek interdependence with their fellow man. One where sacrificing yourself for others, ultimately leads to greater rewards (In the form of guns and chainsaws).

Is this not an accomplished critic of our selfish capitalist society? Are the 20 waves of zombies not a metaphor for the growing problems our world faces? Does the last stand not foreshadow how a coordinated well armed group, can defeat and push back larger invading force?

The last stand is a masterpiece.