Vault

ROTK2 — Sangokushi II (NES)

Design clock 1989; Famicom port 1990. Fully decompiled, and the NES half of the portable-VM proof — KOEI shipped ROTK2 on both MMC5 NES and SNES, so this repo is the oracle for rot3k2-snes.

Links: system → NES · toolchain → KOEI tools · SNES twin → rot3k2-snes · theses → KOEI AI & combat evolution, KOEI’s portable VM

Identity

Field	Value
Logical name	rot3k2-decompiler (public) · github.com/chrisaacson69/rot3k2-decompiler
Sibling path	../rot3k2-decompiler (resolved via .claude/local-paths.md)
Cart	MMC5
Status	✅ fully decompiled — all 18 bytecode banks + native floor + data-walk + memory map
Depends on	koei-nes → nes-render

⚠️ Not cloned on this machine (2026-07-21).

What it contributed

• Off-screen combat: strategy (2) — cheap round simulation. simulate_field_battle $B0BB runs up to 6 rounds; each round computes power = (rng×4−6) · Σ(loyalty/4 + morale/3 + intel/2 + war) · (troops/100+1) / 50, attrites by the power_a·100/(a+b) ratio, and early-exits at 0.
• The cross-console oracle. Because the same title exists on SNES, reversing both sides made each the other’s check — VM opcodes byte-for-byte identical, province record stride 25 on both. This is the specimen behind The Rosetta Stone Method.
• The walk that produced it is what seeded the four-agent cross-family sweep of the sibling decompilers.

Tags

nes · 6502 · reverse-engineering · games