Case study

Namco 2x Systems: rebuilding System 21, 22 and 23 arcade games

Namco 2x Systems rebuilds Namco System 21, 22, and 23 arcade games for Linux and Windows from MAME ROM sets, version 0.271 or later. The playable list includes Prop Cycle, Rave Racer, Tokyo Wars, Dirt Dash, Armadillo Racing, Time Crisis, Ace Driver, Cyber Commando, Ridge Racer 2, Cyber Sled, Time Crisis II, Crisis Zone, and Angler King. Each game names its zip, such as propcycl.zip or timecrs2.zip. Checksums are in docs/ROM_CHECKSUMS.md. The DSP BIOS is built in, so namcoc71.zip is not required.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07
Evidence class: C1 partial scope or analysis entry

Stars: 288
Last commit: 2026-11-08
Language: C
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Download and demo observed; the case covers part of the target software.
Scope: Partial
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

The MAME zip named for each game. Linux build scripts such as ./build.sh take that zip.
License: MIT for this repository's code. Nuklear is MIT or public domain. The Windows programs also include SDL2 and zlib under the zlib license, and Mesa.

Cite

BibTeX

@misc{namco-2x-systems,
  title = {{Namco 2x Systems: rebuilding System 21, 22 and 23 arcade games}},
  howpublished = {\url{https://github.com/spacestate1/namco22-decompile}},
  url = {https://github.com/spacestate1/namco22-decompile},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/namco-2x-systems/}}
}

Plain text

Namco 2x Systems: rebuilding System 21, 22 and 23 arcade games. https://github.com/spacestate1/namco22-decompile (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/namco-2x-systems/

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Primary sources

README.md GitHub · spacestate1/namco22-decompile · Revision 8f2ed7f