Half-Life never really got my attention. Untill I tripped over a comic...
It's the story of Gordon Frohman(NOT Freeman.), just a citizen like each other. He travels by train to a place called City 17, like each other. What nobody knows...they're supposed to be killed, and Dr. Breen is the big cheese who wants everything. If there wouldn't only be Frohman... :)
To say that, I take NO CREDIT for the left image, it's done by the respective owner in the comic, I think he's called Chris mostly. If you pay attention, you'll see that image appearing in the comic itself...
I highly suggest you to read the comic, here.
It's the best thing I've ever read, the humour is genius! Though, you should be at least 13 years, unless you don't care about blood, because it appears quite often, connected with the humour as well.
So yeah...this pic will be my signature soon, I guess.