Here listed 3 interesting references to Retrospectives and games
RETROMAT: https://retromat.org/en/?id=52
Retromat is a tool to select retrospectives. We have web version, but also Paper and Ebook versions
Agile Fluency Game: https://www.itagileshop.de/reflektieren/agile-fluency-game/
This seems to be a true board game. Not available anymore.