You have already extended the areas around the cargo ship on river city day, other areas in all the maps can be extended so that the spider has more lookouts to stand on with its crazy jumpjets.
Some ideas of places to pull back the out of bounds
Frozen City
- Over the canyon near the theta capture point and along the north perimeter of the map.
- The ridge covering C4-D4 of the map between the upper base and the tunnel entrance.
- Removing the invisible walls on top of the cave in C5-C6.
- Extending the southern edge of the map on the hill along the water G3-G5 and H5-H6.
- Extending the north east corner of the map from C7-C8 and D9-F9.
- Pretty much everything on the west, north and east sides of the map.
Let me know what you think of this idea or if there are any other areas/invisible walls I have missed, sorry if the grid locations are incorrect but you should get the idea.
~MonkeyCheese