GOG.com is having a sale this week-end for various 1C Publishing titles, including King's Bounty: The Legend at $3.99. If Heroes VI wasn't your cup of tea, KB is certainly a worthy alternative.

"Become a hero in a fantasy world of fearless knights, evil mages, wise kings and beautiful princesses. Explore the land, command armies and accomplish quests for your king to reap great rewards... Or suffer devastating defeats."

I think there might have been a lower price on Steam this Summer, but the game catalog on GOG.com contains no DRM of any kind. The game also comes with a few extras (artwork, wallpapers, etc.). Happy adventuring!