"Our scouts couldn't bring worse news. In this high mountain wasteland, a group of Giants has been discovered that seem to be grouped in a moor in the Southern part. They have also spotted another horde of these colossal creatures that will arrive in the colony in a few months. We must find a way to finish them before something alters them and they head to the colonies that we have already built in the West. Build a great army and annihilate the terrible giants that threaten the peace of the Empire before it is too late."
Swarms only come from north, northwest and northeast. However, southern entrances can still spawn mini-waves of walkers and especially runners (up until few days before the last wave).
Last wave on day 57 consists entirely of Giants (accurately, a dozen). They may come from different sides, e.g.: north, northwest, northeast (lower segment), east (segments above or below the water area), and south. The Giants number per entrance may vary, e.g. in one instance it was: 4 from the north, 3 from the northwest, and in lesser quantities from three other entrances.