Hey i just installed 1.3 and started the research level, i got to the door at the top of lift, and i went to the exit door, and my gun disapeared and it wont open. All the objectives are complete except that one. So i tried my brothers saved game and it did the same thing, wouldnt open. Another thing, some of the wall and floor textures are drawing wierd, theres a mirage effect and the wall textures draw as you walk. Something aint right i know that.