[Resource] Back Portals?

[ShoggyTheOG]

Have you ever played a game where you went back to a previous area of the game.
To my knowledge, its usually a portal or a fast travel to navigate to locations you previously explore.
It would be cool, as the wad or game proceed, The "back portal" area will be updated/changed.
Relatively the same area, but where changes by the players choice can effect the future of your environment that surround them.
This also add more gameplay for a wad, even its not a megawad. Thus, adding more dynamics to explore along with challenges for a player to battle in this awesome wad/megawad/map.

[Ænima]

have you ever played Hexen or Strife?