I want to see the reaction to the Alien Cannon, and everything thats happening in the Lambda complex, with the scientists helping out Freeman and all. And that whole cache of weaps and the longjump Module.
ANd everything in Xen. Freeman will go crazy over the whole place. And just imagine the voice of the Nih, taunting him. The Gornach, the Nih itself, and last of all, you know that scientist on the last chamber the Nih teleports you too? I want Gordon seeing him on the way out.