Ninja Gaiden Sigma Plus

There's an typo with the trophy description...It's actually "Path to the Master Ninja."

This game has Ninja Trials that are broken in to different levels. For this trophy you only need to clear 2 of these in order for it to unlock. Ninja Tutorials and Path to the Master Ninja both have 5 missions in both which gives you a total of 10 missions to complete.

If you are having trouble, you can always check out this thread for guidance NGS - Mission Mode: All Missions Completed On Master Ninja Difficulty