Destroy All Humans! 2

The final Odd Job in Takoshima might not show up until you've completed most, if not all, of the story missions in Tunguska. The final one will require you to talk to the Black Ninja leader on Sashimi Island and kill a certain cult leader. One thing to be aware of is that this particular cult leader will be surrounded by millions of White Ninjas (exaggerated but still way too many) and might not be difficult to kill by himself, but he will be granted the number of lives that you have had to clone from dying. So if you've died a lot, expect this to be a long fight.