Expert Challenge Stages
If you complete all 50 single-player chapters, 10 more are unlocked. They do not show up on the leaderboards and can not be played in multiplayer, their only purpose seems to be a personal challenge.
Contributed By: BobDole1216.
New N+ Gamer Picture
Beat the expert level challenges to unlock a new N+ gamer picture to use with your Xbox Live Gamertag. The gamer picture features a black ninja with the red headband jumping through the air.
Unlockable How to Unlock Secret N+ Gamerpic Beat Episodes 0-49
Contributed By: Cloud7654.
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