Originally formed as Universal Play Land - Universal's sales branch for the Kanto region - at some forgotten time in the early 1980s, they changed their name to UPL and entered game development for themselves in 1984.
They are best known for games like Atomic Robo-Kid, Ninja-Kun and Penguin-Kun Wars. They allegedly had a fairly generous attitude towards development staff, giving them lots of creative freedom and letting them freely pitch ideas - not a common situation at Japanese developers of the time.
They suddenly went bankrupt in March 1992. Their library was acquired by HAMSTER Corporation in May of 2016.
Notable alumni include Feel Plus founder Tsutomu Fujisawa and Westone founder Ryuichi Nishizawa.