Portals that can be built by players?

  • Portals are super useful to travel for a long distance and currently they are just non-player structures. It would be awesome to have player owned portals. I suggest a "portal framework" that can be built directly by players and powercreeps are required to activate it. To keep the game balanced, these portals cannot teleport creeps to another shard. They also have a room distance limited at 16 rooms (for example). The "out" portal can only appear at highway rooms. The activated portal can't last for a long time either (only a dozen of ticks). We can have a new power PWR_OPERATE_PORTAL that requires high power levels and large amount of ops.