Complex sentence: 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.
Split into simpler sentences: All "Chronicles" games are based on a limited version of the "Heroes of Might and Magic III" game engine. The ability to play scenario maps and multiplayer games is not included in any "Chronicles" title.