From the back of the box
Move like a shadow. Strike like a snake.
After amassing an army of ninjas and lords of darkness, the mysterious Tenrai has begun a quest to conquer 16th-century Japan. Now your master, Lord Gohda, has called upon you - a cunning stealth assassin - to stop Tenrai and his disciples before all is lost.
Live by honour. Kill by stealth.
from Wikipedia
Tenchu: Wrath of Heaven is an action-adventure stealth game developed by Capcom subsidiary development studio K2 LLC and published by Activision in North America and Europe and FromSoftware in Japan for the PlayStation 2 in 2003. It was later ported to the Xbox in 2004 under the title Tenchu: Return from Darkness and to the PlayStation Portable in 2009 under the title Tenchu 3 Portable.