Contra III: The Alien Wars

Game: Contra III: The Alien Wars (SNES / Super Famicom, 1992)

A static recompilation of the US version (a 1 MB LoROM image) with a desktop executable for Windows and Linux: all six code banks are translated function by function into C11 (2,288 functions), from a Ghidra analysis. The repository includes that generated C (src/bank_*.c) alongside a software PPU with modes 0 to 7, a SPC700 and S-DSP audio core written from scratch, controller and keyboard input, quick saves, and a second-player mode. According to the README, it was checked to be bit-exact against snes9x in 13 scenarios with input recordings (stages 1 to 6 in one and two players, plus the attract demo), and a bot played all six stages in 36 runs with no unresolved jumps or hangs. It optionally adds the restored stage-select screen. It has no published releases: you build it with your own ROM. 11 of its 13 commits list Claude as a co-author.

You needYour own US Contra III: The Alien Wars ROM (headerless, 1,048,576 bytes, SHA-256 a93ea87fc835c530b5135c5294433d15eef6dbf656144b387e89ac19cf864996), next to the executable, in its parent folder, or in a sibling ROM folder. You build it yourself: CMake and a C compiler (a build.ps1 script on Windows) or, on Linux, X11 and ALSA.

How it gets to PC

Static recompilation

Console

Super Nintendo / Super Famicom

Architecture

65816

Author

BrixW

Original studio

Konami

Year

1992