After finding that weird room with all the weapons floating in Mid-Air while messing around with the Noclip code, I decided to check all the levels for the same room. Turns out, nearly every level in the game has these rooms. In this game, the number of items and weapons that can be found in these rooms has doubled. Some now include the Enviro Suit inventory item. These rooms can be hard to find due to the walls of these rooms being invisible. The only way to find them is to look for a VERY faint red or blue PDA in the distance. The PDA is your personal PDA. The PDA also includes a video disk that downloads a non-existent video. There are 12 of these hidden rooms known in the entire game. I left out one because I already uploaded it a while back. www.youtube.com The first hidden room in this video is the room where the cutscene from the 1st level took place. But why do these rooms exist? Anyone know?