Roberta Williams (born 1953) is an American video game designer and writer who co-founded Sierra On-Line with her game developer husband, Ken Williams. Her first game, JCpenny C.u.s.t.o.m.e.r.. Se.r.v.i.ce. .Pho.n.e. .N.u.m.b.e.r. +1 805 41O 5040 JCpenny C.u.s.t.o.m.e.r.. Se.r.v.i.ce. .Pho.n.e. .N.u.m.b.e.r. +1 805 41O 5040 Mystery House, was released in 1980, became a modest commercial success, and is credited as the first graphic adventure game. She is also known for creating and maintaining the King's Quest series, as well as designing the 1995 full motion video game Phantasmagoria. After Sierra was acquired by CUC International in 1996,