Case study

Alien Trilogy: a byte-matched PS1 source reconstruction

Alien Trilogy reconstructs C source for the USA PlayStation game executable SLUS_000.07 using its original GCC 2.5.7 toolchain. Per-function comparisons check rebuilt code and relocations against retail bytes; a gate overlays rebuilt units on the user's executable and checks the complete hash. The author reports 645 byte-matched game C functions, with remaining gaps and pending source-quality work documented.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 11
Last commit: 2026-10-17
Language: C

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: A personal copy of the retail SLUS_000.07 executable is required.
Prerequisites: The pinned PsyQ toolchain, Runtime Library 3.3 SDK, Python 3 and DOSBox-X are required.
Limits: The author reports 452 remaining byte gaps and eight MATCH-PENDING functions.
License: MIT license.

Cite

BibTeX

@misc{alien-trilogy-ps1-decomp-case,
  title = {{Alien Trilogy: a byte-matched PS1 source reconstruction}},
  howpublished = {\url{https://github.com/lemiur/alien-trilogy-decomp}},
  url = {https://github.com/lemiur/alien-trilogy-decomp},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/alien-trilogy-ps1-decomp-case/}}
}

Plain text

Alien Trilogy: a byte-matched PS1 source reconstruction. https://github.com/lemiur/alien-trilogy-decomp (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/alien-trilogy-ps1-decomp-case/

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Primary sources

README.md GitHub · lemiur/alien-trilogy-decomp · Revision b0bf720
PROGRESS.md GitHub · lemiur/alien-trilogy-decomp · Revision b0bf720