Kings bounty:the legend is basically that. I am a huge heroes 3 fan. Kings bounty is focused more on the battles than collecting resources. You don't have a castle but you do have places to get troops. It is one constant campaign. It is a remake of the first one. As a heroes fan I am loving it
I know there is a demo of it. But I only got into it once I played a good 2 days as it is very hard in the beginning. Look for some online reviews I think it was ign or gamespy gave the game 90%