Half-Life is incredible. The story keeps pulling you along to see how it will all end. And with the incredible enemy AI and fantastic level design, it's utterly addictive! I like it so much because there are so many memorable scenes in the story. I played this game once before, but never finished it. Now that I'm playing thru again, I remember battles that were particulary viscious - Killing the monstrosity in the Blast Pit - having head crabs jump on you in the blackness of the tiny air shafts - fighting the soldiers as they lob grenades and work as a team - the ride on the railcar - ascending the nuclear core using the portals - ....