Case study

jpog-decomp: rebuilding Jurassic Park: Operation Genesis and Toshi

jpog-decomp rebuilds Jurassic Park: Operation Genesis and its Toshi engine in C++20, replacing original functions one at a time. Its 32-bit Windows build compares reconstructed DLL exports with the original, while a portable SDL3 and bgfx shell targets Windows, Linux and macOS. The author reports that the hybrid build opens a game window and that the portable build remains an early developer shell.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 3
Last commit: 2026-10-22
Language: C++
License (GitHub): GPL-3.0

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: A user-owned PC copy of Jurassic Park: Operation Genesis supplies game data and is needed to run differential tests.
Prerequisites: Building requires a C++20 toolchain, CMake 3.28 or newer, Ninja and Python 3.10 or newer.
Limits: The author reports 1,849 of 20,452 target functions reimplemented; full gameplay remains a roadmap goal.
License: GPL-3.0-or-later license.

Cite

BibTeX

@misc{jpog-decomp-case,
  title = {{jpog-decomp: rebuilding Jurassic Park: Operation Genesis and Toshi}},
  howpublished = {\url{https://github.com/Voikanaa/jpog-decomp}},
  url = {https://github.com/Voikanaa/jpog-decomp},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/jpog-decomp-case/}}
}

Plain text

jpog-decomp: rebuilding Jurassic Park: Operation Genesis and Toshi. https://github.com/Voikanaa/jpog-decomp (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/jpog-decomp-case/

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About this entry

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Primary sources

README.md GitHub · Voikanaa/jpog-decomp · Revision 15005dd
docs/progress.md GitHub · Voikanaa/jpog-decomp · Revision 15005dd