Hi,

I've tried to use the lock/unlock feature and it just doesn't want to work... or im doing something wrong. Here is a screenshot of what is problematic.

https://www.mediafire.com/?vbrvv6wvsslwj72

Basically, I want to lock an exit with a giant stone slab, but the moment the player picks up the slab, the way should be unlocked as the stone slab isn't there anymore. So, when the slab is present, the logic ensures that the exit is locked. But, when I grab the stone slab, the exit is still locked... and I don't know why that is.

The exit should be unlocked when the player picks up the slab, so the way to do this is, well, like that. Go to the Inventory tab of the slab, and look at the "After taking the object" bit. Add the script to unlock the door there.

Is your exit called "exit"? It is possible that will confuse Quest; a more specific name might be better.