Tenchu: Stealth Assassins is a stealth game released for the original Playstation, in which the player takes the role of a ninja, progressing through 10 stages set in ancient Japan and accomplishing the tasks therein. [Infos from Wikipedia]
Thanks to Mozgus we are able to see an interesting video from an early prototype of the game, that was found in the Japan-exclusive disc Tenchu: Shinobi Hyakusen. In this old build, it seems that Tenchu was going to be more “futuristic” and the style of the game was very different from the one in the final version.
Thanks a lot to Mozgus for the contribution!
Video (beta / proto):
Video (final version):