1998 · Stealth / Action · PlayStation
Tenchu: Stealth Assassins (1998) is Acquire's ninja game set in Sengoku-era Japan, which helped define the stealth genre alongside Metal Gear Solid and Thief.
The ninja Rikimaru and the kunoichi Ayame serve Lord Gohda, and the player picks one of them for eleven open-ended missions. The aim is to stay unseen, slipping past guards or killing them quietly, with the Ki meter showing how alert nearby enemies are and how close they stand. The grappling hook is the only item kept between missions, and each mission is ranked from "Thug" to "Grand Master".
Takuma Endo directed it and wrote the scenario. Sony Music Entertainment Japan released it on 26 February 1998, and Activision published it in North America in September. It sold more than 1.4 million copies worldwide by 2003, and Tenchu 2 followed in 2000.