Klepto: a lost stealth grappling-hook game for N64, inspired by Umihara Kawase (Patreon)

Klepto is a cancelled action platformer / adventure / stealth game in development by Utopia Technologies / Sandbox Studios between 1998 and 2000, with a planned release on the Nintendo 64. Inspired by Umihara Kawase, the team wanted to create a 3D third person grappling hook game. The idea was that you played a cat burglar-type in a Sci-Fi world. Each mission was designed to be playable in several ways, i.e. you could sneak in and steal the target itemand if you were really good, you could sneak out without being detected. However, taking the loot would likely set off alarms and you’d have to fight your way out. Or, if you preferred, you could try fighting your way in and out: https://www.unseen64.net/2016/12/08/klepto-nintendo64-cancelled/