Five Nights at Freddy's 4
Five Nights at Freddy's 4 (PC) has an open-source reimplementation, Sergey004/FNAF1-Recomp-proj.
Data checked 2026-10-22 · unbaked registry
Projects
A very experimental C++ port\clean-room reconstruction and recompilation of FNAF 1,2,3,4 and SL for the Xbox 360 (No Assets Included) This project is NOT IN any way related to “FNAF X360 - IN DEV”
A C++ rebuild of the classic Five Nights at Freddy's games for the Xbox 360 (XDK), written from each game's own Clickteam event data as dumped by the author's CTFAK-CPP. One codebase hosts FNAF 1 to 4 and Sister Location: per the README (v2.71), FNAF 1 is complete and playable, FNAF 2 to 4 are code-complete and Sister Location is about a quarter done. Runs on Xenia or a modified console, from paks built from your own copy of each game. The repository has an AGENTS.md for coding agents.
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What you need
You need your own copy of the game: these projects ship code only.
More on PC
GitHub data checked 2026-10-22. Notes are summaries from the research pass; the project pages are the authority.