Zac involuntarily takes Rob back in time 20 years to the year of video games and the release of the first Half-Life game. Shame the timing doesn't work out to be half our lives ago but ho-hum.

Half-Life
Dr. Gordon Freeman doesn't speak, but he's got a helluva story to tell. This first-person roller-coaster initiated a new era in the history of action games by combining engrossing gameplay, upgraded graphics, ingenious level design and a revolutionary story that may not be all that it seems, told not through cutscenes, but through the visual environment.
As the Freeman works his way through Black Mesa, the danger grows. Bigger aliens, bigger guns and bigger vats of goo.
Trundle with us through even more ridiculous parts of Black Mesa, this time on a train. Note that the train does not make this section quick as you would expect.
Black Mesa makes an Amazon warehouse look like a tiny ant farm. Just how much residue is there to process? Zac and Rob investigate.
It’s finally time for everyone’s favourite headcrab! Surface Tension remains one of the more memorable parts of the Half Life campaign.
Zac and Rob guide Gordon through his efforts to escape the bombardment of Black Mesa. He might end up travelling a bit far.
Good thing there’s nothing weird and naked on the other side of that teleporter thing... oh.