King's Bounty is one of the most charming games I've played. For an extensive review of the entire series, my blog: http://waltermstewart.wordpress.com/2013/01/15/kings-bounty-series-review,
for a condense review of this game, read on.
This is the first entry in the series and it is well worth the current listing price, but it frequently goes on sale (at least 3 times a year if I recall, also available in a bundle pack if I'm not mistaken). This game is an adventure/exploration game in a generic fantasy world following all the common tropes. The primary difference between this game's lore and the world you are already familiar with is the sense of humor the writers have. If you take the time to read the text (no voice overs), you will be rewarded with the occasional typo (originally from Russian), but more frequently a wonderful lore based joke, parodying modern fantasy lore.
The battles and strategy within are quite fun, and the game progresses reasonably, but it doesn't ruin the experience and shouldn't prevent you from playing this game.
If you like RPGs, quest driven games, turn based or grid based strategies, I highly recommend this game.