Go Back To Pallet Town in Alien Swarm
Alien Swarm. You probably have it, since it was free. People who make mods and are Pokemon fans have it, too. Well, technically, people who make L4D maps who then port those maps into Alien Swarm to see how the SDK holds up have it. Semantics! Take a look at this awesome mod that recreates Pallet Town in Alien Swarm.