I have started developing a single player campaign and learned the mapping techniques today. I got a basic level with a button working that opens a door, and a box on a platform. I now understand how Portal mapping works after ripping the decompiled maps to shreds. I'll post a basic tutorial here on Buttons and doors when I get home from work today.
Portal: The Quest for Cake is a storyline where you are in another one of Aperture Science's test facilities and your ultimate goal is to unlock each ingrediant by solving puzzles and beating level to unlock the cake at the end.
I found a robotizer program and going to feature a male AI voice for the narrator. Been playing around making little mini puzzles. When I get home i'll post my demo map and how I constructed it.
