Hey there. Sorry if this seems like an awkward thing to ask, but what's the full canon of the series? I think it goes Birth of the Stealth Assassins > Stealth Assassins > Fatal Shadows > Wrath of Heaven > Shadow Assassins, but what about the spinoffs like Tenchu Z, Shadow Assault, or DS? Does the DS one even count? It wasn't made by the team that made the series (Aquire) nor was it made by the team that did every other major installment following that formula (K2). I figure it's a game like Hotel Mario or Resident Evil Gaiden; it's a game with the franchise name, but there are very noteworthy reasons as to why it doesn't count in the grand scheme of things (in this case, due to a developers one-shotted attempt at making a Tenchu game and creating one of the most critically disliked games on DS).