They load Ben into the jeep and drive him out to the factory where he was being treated, and Rob puts Ben down. Within the laboratory, they find, along with the several zombies and a dead scientist, a lifeless Ben. After looking through the rest of the town, they unexpectedly find a secret laboratory hidden under a tomb.

Rob decides to take the officer's uniform. They also find a dead Civil Protection officer, outfitted with the newest in their line of armor before the outbreak, and according to Rob, better than his armor. David and Rob encounter a new type of zombie, one zombified without a headcrab latching on to them- an Infected. After a brief conversation about their past lives before the outbreak, they explore the town. The two walk into town, and take a seat on a bench.

He offers to help Ben, however, Ben suddenly turns and bites the doctor, forcing the two to put the medic down. Rob and David reach a small factory where a medic has been hiding. Sometime between then and the next episode, Ben is bit. David lets him come along with him and Rob, and after gathering supplies for their jeep, they proceed on. He has no recollection of who he is beyond his name, and the fact that he has amnesia after falling from a bridge and injuring himself. They travel through a large underground tunnel below an unnamed city, where another survivor, Ben, has camped out for the past three months. After scavenging the city, and coming up mostly empty handed, they are suddenly bombarded by Combine headcrab pods, and are forced to leave on their jeep. David notices Rob's father in the picture looks like the man following him, however, Rob says that the photo is not of his father but of Rob himself. Rob had gone back to Big City to search for his family photo, and also got some supplies. Incidentally, he finds Rob sleeping in the very same building David took shelter in. After driving through city square and departing his vehicle, David finds himself being spied on again by the man, who gets away again. With fresh fuel, David drives to a formerly Combine-occupied city, while Rob parts ways with him to find his family. Rob returns with several gallons of gas, and he and David make a narrow escape from the facility. After splitting up from Rob, David sees the strange man from the surveillance camera again, this time directly staring at him from behind a window, and calmly walking away. After leaving the mysterious vault, David and Rob explore through a pipeline, in search of gas for their jeep, that leads them into an abandoned mine mostly collapsed with rock. They encounter another underground bunker, where sometime before the outbreak, the man they saw on the security cameras was being contracted by, presumably, the government to open the door of the bunker. After getting the door open, David and Rob fight their way out of the base, and escape via jeep. At the same time, the power to the base fails, and the emergency alarm goes off, the latter likely being due to zombies breaching the bunker. They trace him to a small room in the base, in which the door behind them suddenly locks. David also sees security footage of a strange man walking through the base, which David and Rob go to investigate. They find footage of the initial outbreak in the base, and a guard telling a scientist that the 'creation', likely the headcrabs, has 'gotten out of hand'. They travel to a large arid desert, and find a large underground bunker complex. The two decide to leave the city on David's humvee. The two introduce themselves, and Rob tells David he was trying to signal David to get help. Rob questions David as to his identity, and how he got into the apartment. Suddenly, he notices gunshots, and traces them back to a small apartment where he meets Rob, an ex- Combine soldier. He makes his way through the city, now infested with zombies, searching for survivors. Season 1 begins as David Hawkings drives into Big City through the highway overpass.

Gmod zombie apocalypse episode 1