Case study

Grand Prix 4 Decompilation: behavior-matched GP4.exe functions

Grand Prix 4 Decompilation reconstructs GP4.exe functions as C++ and compares each candidate with the original under generated emulator inputs. Its repository includes a function ledger, input layouts and an in-game hook; the author reports 5,669 functions accepted by differential emulation while a playable replacement remains unfinished.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-09

Stars: 9
Last commit: 2026-10-23
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: Requires the user's copy of the specified Grand Prix 4 GP4.exe build.
Limits: The author reports 5,669 functions accepted by differential emulation and 306 awaiting in-game checks.
Limits: The reconstruction does not yet build a playable replacement executable.
License: MIT licence.

Cite

BibTeX

@misc{grand-prix-4-decomp-case,
  title = {{Grand Prix 4 Decompilation: behavior-matched GP4.exe functions}},
  howpublished = {\url{https://github.com/leighrobertabbott/decomp-grandprix4}},
  url = {https://github.com/leighrobertabbott/decomp-grandprix4},
  urldate = {2026-11-09},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/grand-prix-4-decomp-case/}}
}

Plain text

Grand Prix 4 Decompilation: behavior-matched GP4.exe functions. https://github.com/leighrobertabbott/decomp-grandprix4 (accessed 2026-11-09). Awesome REA entry: https://awesomerea.org/resources/grand-prix-4-decomp-case/

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Primary sources

README.md GitHub · leighrobertabbott/decomp-grandprix4 · Revision d71cbd4