 As part of that strategy, each installment of "Chronicles" was released as a low-cost episode containing a relatively short single-player campaign, and the difficulty level of each game was kept low.All "Chronicles" games are based on a limited version of the "Heroes of Might and Magic III" game engine, although the ability to play scenario maps and multiplayer games is not included in any "Chronicles" title.The series consists of eight installments released in five retail packages and supplemented by two downloadable packages.