Required Tools:Download required files below (you will need winrar to extract the contents inside)
Fiddler2
Chrome/Firefox
Cheat Engine (ziddu.com)
Note: Seems like ErrorLog mission for 15k can only be done ONCE. You will get an error if you do it again.
Steps:
1.Open Fiddler and go to Autoresponder (Tutorial for fiddler)Click here
2.Tick both Enable auto... and Permit Passthrough..
3.You will be replacing the data_library_en file so click ADD and insert this rule editor
4.REGEX:(?insx).*data_library_en\.swf$
5.Replace it with the downloaded file from the links above.
6.If you are unsure of how to replace files using fiddler, kindly read the tutorial
7.first as it will help you greatly. Tool's Tutorial
8.Once replaced, just go into Ninja Saga and you will have amaterasu, custom missions, all missions unlocked.
9.Tested, working, and savable as at 30/6/2010
