forthefreeman98

Blue Shift and Opposing Force are both considered canon at the moment. Barney was the player character of Blue Shift and appears as a main character in HL2. Valve has confirmed that the nuking of Black Mesa in Opposing Force is canon. The only thing that is not canon from the expansions is Race X from Opposing Force. That was a completely Gearbox-based creation and as such is not part of the series. As for Adrian Shepard, he could or could not appear in a future game.

Since about episode 28 was released, I think.

Now, if Freeman thinks he can think of aliens that are better than Xen's, do you think he can create ones that beat the Combine's Synths. (For anyone who doesn't go into Half-Life's background that much, a Synth is an organic-machine hybrid. These are the Striders, Gunships, Hunters, etc. ) I mean, The Combine has creatures that are their weapons and vehicles. How do you beat that?