In 2004, the horror saga that is the Saw franchise began, establishing the concept of "games" that involve physical and psychological torture as a means of testing whether an individual truly deserves to live or die, along with introducing the infamous evil mastermind behind it all -- Jigsaw. What started as a story of two men waking up in a disgusting bathroom with their ankles chained up and a dead body between them holding a tape recorder that, when played, asked them if they wanted to play a game has evolved into a series of movies with graphic gore and twist endings that have made Saw a staple in the horror genre. With Saw X coming to theaters at the end of 2023, those curious to delve into the series have an opportunity to complete a rewatch of all seven main movies, as well as the prequel and a copycat killer entry. However, for those who want to introduce the uninitiated to the wicked world of Saw before the movie's theatrical debut, contrary to the concept of starting at the very beginning, the 2005 sequel Saw II is the better movie to begin with.
Source:https://www.cbr.com/saw-2-best-entry-point-saw-franchise/