Complex sentence: They worked with publishers Codemasters for a number of years following their first collaboration "Super Robin Hood", most notably creating the "Dizzy" series of games and many of Codemasters popular Simulator Series.
Split into simpler sentences: They worked with publishers Codemasters for a number of years following their first collaboration "Super Robin Hood", most notably creating the "Dizzy" series of games. The Codemasters publishing relationship led to the origin of the Dizzy series and the Simulator series.