How to make a teleporter like Alone In a Dark House's?

I am not at all great at scripting I would seriously love any help or a model perhaps. If you dont understand my question this games lobby teleporter sums it up quite well: Alone in a dark house. I understand how to create a teleport script but only from one point in a map to another, I need to somehow change it from one game to another and to bring a number of people with it?

Thanks, hope you can help me :)