Heroes chronicles was clearly developed for the fans of HOMM3. I had purchased online all six chronicles from 3DO just before they went bankrupt and managed to also nab the two free downloadable chronicles before they disappeared forever...or not quite so, it would seem! Thanks GOG! If you loved playing Heroes 3 into those late nights as I did, you'll love these chronicles as well. As mentioned already, they are all simply campaigns and no RMG. Honestly though, this is just fine! If you buy this, it's because you love HOMM 3 and you would therefore already have the other "missing" features with the original titles. The play is the same, but the stories are great and involving. The price is very reasonable for what you get. I had paid $20 for each chronicles when purchased online and was not disappointed, so $10 for everything is a great deal.
