"Shortly after joining the project, Mika helped Penn and Levy assemble a list of games that could give them ideas for Free Guy’s story or influence its look, including GTA, Fortnite, and the work of Will Wright (who created SimCity, The Sims, and Spore)." https://www.theringer.com/movies/2021/8/16/22626608/free-guy-ryan-reynolds-zak-penn-matt-lieberman
https://www.latimes.com/entertainment-arts/movies/story/2021-08-12/free-guy-video-game-design
https://www.theringer.com/movies/2021/8/11/22619043/ryan-reynolds-career-arc-free-guy-deadpool
https://thedisinsider.com/2021/08/12/free-guy-review-ready-player-one-meets-the-truman-show
Free_Guy is somewhere in between Ready_Player_One and The_Truman_Show, indeed.
https://screenrant.com/free-guy-opening-weekend-box-office-better-than-expected