Evidence at a glance
Based on the linked sources. The author's reported result and independent confirmation are separate checks.
- AI involvement
- Reported models: Claude Opus 5.5. Tools not reported. The writeup below describes the work attributed to AI.
- Reported result
- Works. This is the directory's source-based outcome classification.
- Independent confirmation
- Not reported.
- Human work and limitations
- The project uses a fidelity scoreboard to track parity with the original game, reaching 112/112 cases. Integration tests verify end-to-end functionality, such as playing scenarios from scratch.
Original sources
What was done
A reverse-engineered recreation of Railroad Tycoon 2 achieving full fidelity with the original game across 112 test cases, including long-horizon simulations up to two years of play.
The pedryvo/rrt2-decomp project is a reverse-engineered implementation of Railroad Tycoon 2. The project documents full fidelity with the original game, reporting that 112 of 112 tested scenarios are identical to the original, including long-horizon simulations spanning up to two years of gameplay. The implementation includes core simulation logic, such as finance actions, train movement, and construction tools, as well as UI components like station details and terrain radar. The project supports loading original save files by converting them to the new format. Claude Opus 5.5 is credited as a co-author across multiple commits, contributing to tasks such as AI manager review and the implementation of simulation features. The project provides automated build workflows for Linux, Windows, and macOS, though it does not package original game assets.