detector - invisible objects, serving as... detectors (whatever it means)playermonsterbulletlairwallitemdoortrap - not usedregion - see: regionsobstacle - barrels etc.hostiles - monster, lairfriendly - playeractors - hostiles, friendlystatic - bullet, wall, item, doormoving - detector, player, monster, bulletnonmoving - lair, wall, item, doorpathblocker - wall, doordestructible - actors, obstacle