DuChatNOT: Doorways and saving progress
Dial Puzzle
Lucid Stew: How to make a door code puzzle with moving dials
Level linking (doors)
LadylexUK: Level linking, one way and two way doors
Gadgets: Doorway
LadylexUK: A look at the doorway tweak menu
Automatic Two-way door
A two way swinging door
Using doorways
Level linking using doorways
Two way teleports
Two way teleporting within a level
Sound activated switch
Use the microphone for game mechanics
Lever and Door Mechanism
A lever and door opening and shutting microchip
Stepping Stone Door Puzzle
How to make a locked door puzzle with a stepping stone sequence
Pressure Pads and Blocks
How to make a game mechanic with a block carry to a pressure pad.
Beginners Guide to the Doorway Gadget
An introduction to the doorway gadget