I recently bought the pdf of Fantasy Chess, a game which adds simple RPG-like elements, such as hit points, rolling to hit and healing, to chess.
This is an idea that’s appealed to me for a long time, possibly fueled by the book The Chessmen of Mars and the old computer game Battle Chess (although Battle Chess is actually just normal chess with cool animations).
Anyway Fantasy Chess does a good job in my opinion, although I changed some of the rules to make it easier (specifically the rules about carrying other pieces). The actual pdf looks quite amateurish, but the game is better than that suggests.
If you’re interested in playing this game, you need a bigger board for your pieces than for normal chess. This is because up to 6 pieces can be on the board at the same time. I was lucky in finding a single eBay auction which had a chess set and a larger-scale checkers set for sale.