Complex sentence: Yonezawa PR21 (also known as "Party Room 21") created Family Computer and Super Famicom games during the 1980s and the 1990s in addition to other console systems like the Sharp X68000 and the Game Boy.
Split into simpler sentences: Yonezawa PR21 (also known as "Party Room 21") created Family Computer and Super Famicom video games during the 1980s and the 1990s. They also created video games for other console systems like the Sharp X68000 and the Game Boy.