1. Thou Shalt Learn Fighting Techniques from Corpses
It's a strange fact of life in Ninja Gaiden II that mouldy old corpses are an invaluable source of technique scrolls. At least, very early in the game they are. It's not long, however, before the corpses begin showing signs of deep depression, leaving little notes saying stuff like "Try as I might I just can't learn the technique of The Sword of a Thousand Truths. What's wrong with me?" or "Dear diary, I suck, signed Ninja #2038". It's sobering stuff coming across corpse after corpse that apparently suffered from cripplingly low self esteem before being 'killed in battle'. Teen ninja depression. It's serious shit.