8 hours, walker spawner junk. Walker spawner doesn't do a one time kill check. This has been replaced with a collider on the bottom of the object that deals lethal damage to anything it overlaps. Units spawned in to the game no longer assume the floor is at a certain height, ray casts are used to find the floor in all cases. Delay between walker kill sand top collapse, top tilt is applied before collapse. Damage is only dealt when top is in descent. Walker spawner starts farther from the ground. Pick ups no longer get stuck in walker spawner junk top.