Female scientists were planned, with a story bit involving one betraying Gordon and sending soldiers after him.Scientists and Security Guards had much more exaggerated faces before being toned down into something more believable.
This was refined into a trim goatee and a more form-fitting suit for the final design. Gordon's original design originally had a wild, unkempt beard and thicker face going along with a much larger HEV suit that that led to him being dubbed ' Ivan the Space Biker '. When it became apparent that the engine wasn't going to be able to deliver what the development team wanted, they considered porting the game to the Quake II engine, but after figuring out that it would delay development by too long, they instead started modifying and customizing the Quake engine to suit their needs, eventually ditching about 90% of the original code.
