RTF is a global modification that replaces all towns in the game.

Yes, those are the ones. Nag initially wanted to add them with a patch, but Ubisoft told Nival to halt development. Yeah. In the game, when you hover the mouse over a unit, many of them trigger their own animation. Some look around, some stretch (figuratively). This is to give the player a greater sense of interaction. If adding a unit to the NCF, I would suggest naming it a snow gorilla rather than a Yeti. Yetis were shown in Elemental Guardians, and they look different there. It would be like a real upgrade of the gorillas they originated from.