The nod emissary and the stealth tower have been updated. The emissary now spawns repair drones, and is stealthed, also it is faster and cheaper. Also, the outpost is stealthed and provides a small amount of energy. The stealth tower cloaks itself, and cyborg infantry have innate healing. This allows nod to have a tactic of cloaking the entire map. There are many interesting tactics unlocked once you have real stealth!