Follow the thoughts of Dr. Gordon Freeman, a 27 year old physicist and neurotic individual.

In this episode, Freeman arrives at the lobby, deals with office politics, and suits up for the lab's experiment.

In this episode, Freeman continues to the testing chamber and begins the experiment.

In this episode, the experiment having turned into a failure, Freeman starts making his way back up to the lobby.

In this episode, Freeman makes it to the lobby and attempts to escape the facility.

In this episode, Freeman looks for an alternate exit and descends further into Black Mesa.

In this episode, Freeman performs feats of balance in his attempt to find an alternate route.

In this episode, Freeman ascends a floor and has electrical encounters in his attempt to escape.

In this episode, Freeman runs into some trouble and locates an exit.

In this episode, Freeman cools off and goes deep into the ventilation system trying to escape.

In this episode, Freeman ends it all.

In this episode, Freeman continues his ascent, hops over lasers, and finds a submachine gun.

In this episode, Freeman meets the "rescue team" and continues his ascent to the surface.

In this episode, Freeman finally makes it to the surface, encounters some new problems, and spends more time in ventilation shafts than ever before.

In this episode, Freeman escapes from the ventilation shafts, finds a new path, and heads downward again, trying to find another exit.

In this episode, Freeman braves radioactive waste, finds a new route, and encounters something much bigger than him.

In this episode, Freeman manuevers around a giant monster, wanders deep in Black Mesa, and gets stuck.

In this episode, Freeman gets winded, presses more buttons, and crosses treacherous gaps.

In this episode, Freeman descends deeper, monkeys around, and comes to a dead end.

In this episode, Freeman backtracks and blows his top.

In this episode, Freeman gets wet and plummets further in his descent of Black Mesa.

In this episode, Freeman evades yet another giant alien, soldiers, and the ceiling.

In this episode, Freeman negotiates the best he can with the military and tries to start up the power generator so he can escape.

In this episode, Having powered up the generator, Freeman makes his way back to the train tracks in order to get to the surface.

In this episode, Freeman continues trying to get the power on to the railway so he can escape and encounters even bigger problems.