FreedTerror

I want to have certain teleport's unavailable at first, then make certain teleport's available when the player interacts with a certain object.

Shadow_Fire

You have two options on designing it.
One, use the one that came with ork.
Two, use a custom one, by doing it via the event system.

I recommend the custom one if you want to have special effects before you teleport away, like having the teleport stone rotate, player doing an animation, etc. The ork one will fade the screen instantly after you pick a choice.

Just create a new event, and in it create a show dialogue (choice).
After creating the choices, to make sure they don't appear before a requirement is met, like interacting with a certain object, in their variable requirement settings, just set a bool var to true.

Then to make them available, in your interact object event, use a change game variable node to change the bool var to true.

FreedTerror

Thanks @Shadow_Fire. The custom teleport setup is really nice. :)

For my change game variable node bool var, I checked the value option and got it to work.