Today's Steam deal - King's Bounty: Armored Princess - is a very capably done Heroes of Might and Magic knockoff. I had a great time with it, so if you're a Heroes of M&M fan you can't go wrong for six bucks.
Actually King's Bounty came before M&M the first one was an old Sega game. M&M is by no means a knock off and certainly took the game to a higher level just building off it.
The original original King's Bounty was before Heroes. King's Bounty, the newer version you buy on Steam, was produced by some of the original developer(s), I believe, but still took stuff from M&M. They heavily influenced each other.