Complex sentence: It relocated to Wood Dale, Illinois in 1984 and in 1999 it relocated again to Redwood City, California, leaving a location in Illinois open strictly for the manufacturing of Konami's arcade video games.
Split into simpler sentences: It relocated to Wood Dale, Illinois in 1984. In 1999 it relocated again to Redwood City, California, leaving a location in Illinois open strictly for the manufacturing of Konami's arcade video games.