Warp Zoned writes:

“Its just another day at work for Gordon Freeman. The well-groomed scientist is running late for an important meeting and hes forced to board the tram alone as he travels to the secure wing of the Black Mesa Research Facility.

Its a rather lowkey introduction to one of the most ambitious games ever created, but easing the player into the games world was a big part of what made Valves Half-Life so ambitious. Youre free to move about the train car as youre ferried from the facilitys living quarters to the research levels belowground, but for those five minutes, youre also at the mercy of the developers and how they want you to interact with their game.”

Source: N4G PC The Video Game Canon: Half-Life