Simple script, not done before.
You can easily add an entity and set password to it. Only players knowing password can open it (or players who check all its combinations - it's like using picklock, isn't it?).


If you want to add it to your map and upload anywhere, put me in credits

It's not really save. Everybody can look up the password in the map editor but it's a good script.

Good idea.

@ Yates:
Why are you so upsest with doors?

Fucking madness. Now I can just say I don't know the code when someone asks to open door, genius!