7. Half-Life: Blue Shift – June 2001

I’m always surprised by how many folks dislike the Gearbox-developed Blue Shift I agree it’s too short and doesn’t do anything drastically new with the Half-Life engine or world, but it’s not bad. And playing as a non-scientist at Black Mesa gives you an interesting new insight behind the scenes of that place. Turns out, security guards get treated badly. Also, you finally find out the identity of the security guard locked out at the start of Half-Life’s famous tram ride. It was you! (Well, Barney actually.)