As of the publication of this article, Mob Entertainment has officially announced Poppy Playtime Chapter 4 for a 2024 release window (specifically rumored for late Fall/Winter). If you find websites offering the "Chapter 4 download" before the official launch date, they are almost certainly scams, malware, or fake files. Proceed with extreme caution.
Since Chapter 4 will be larger and more demanding than Chapter 3: download poppy playtime chapter 4