Finish all the levels by killing the guards in Ninja Rampage. The best way to kill the guards is to wait until they have their backs turned on you, come up from behind and strike. Look out for traps, these will not only kill you but you can also lure enemy units into these traps. Start to think like a ninja and how you can use your skills to your advantage.
VN:F [1.9.22_1171]Ninja Rampage,