Looking for a solo puzzle tour that I played a few years ago?

According to the information you provided, I'm not sure which game it is. However, according to the clue you provided, it may be one or more of the following games:

1. Seventh guest: This is a puzzle game of 1993. In the game, players need to find hidden keys in the magic room to solve puzzles. When the player completes each puzzle, it will trigger a short story, including a scene in which the character played by a puppet is executed. But this game doesn't have the plot of executing a person at the end of every stage you mentioned.

2. Twelve Magic Marks: This is a 20 12 puzzle game. The scene of the game is set in a huge ruin. Players need to explore the world by solving puzzles and collect all the scores. The theme of the game is the twelve constellations and the seven deadly sins of mankind, and the characters are all gloomy and horrible. In the game, players need to trigger events through some cards in turn, and a demon will appear and talk to each event. When the player finishes all the puzzles, it will start a puppet show-like ending.

Ghost city: Moonlit Night: This is an action game of 1997. Ripa Belmond, the protagonist of the game, needs to explore and defeat all kinds of demons in the castle. In the game, there will be some scenes that will lead to a puppet show, but the theme of this game is not to solve puzzles, but to act.

I hope this information can help you.