res/locations/*.csv, eight of them. these are what LogicBattle::initDefaultSector
walks to place the towers: training_arena has KingTower at tile 18,6 and 18,58
and four PrincessTowers, plus a 64x24 tile bitmask.
without these there is no way to build a battle snapshot, the leaders come from
here and the client dereferences them without a null check.
