Cyberfoot 2015 — native JavaScript reconstruction

A from-scratch browser reconstruction of Cyberfoot 2015, built by reverse engineering the original Windows game. It runs as plain ES modules in the browser; it does not load the original executable, Wine, WebAssembly or a CPU interpreter.

Status: development preview — not feature-complete and not pixel-identical

This is an unfinished reconstruction, not a released game. Several screens below are development fixtures that use automatic test decisions, and complete-game end-to-end parity has not been achieved.
Progress so far: the match engine, fixtures, settlement, standings, history, transfers, contracts, training, manager changes and several original forms have native implementations, and the original 2,658,632-byte career save round-trips byte-for-byte.
Verification approach: a development-only oracle executes the original machine instructions and the native module must reproduce the same result, mutated state and random draws. 255,507 recorded original-execution comparisons currently pass in both Node and Chromium with 0 failures.
Those comparisons are routine-level and dispatcher-level checks, not a proof of whole-game equivalence. UI pixel parity (Windows fonts, control rendering, exact message-box styling) is not certified, and registered-edition content is not covered.

Playable flows

New game

Career entry

Create or load a career from the original career template and persist it in localStorage.

Entry flow only: after creation it hands off to the development career loop.

League & cup

Career loop

The development league/cup loop: lineup, match, results, round advancement and player development.

Round loop with automatic test decisions; regular day-to-day career routing and complete season progression are unfinished.

Transfers

Transfer auction window

The original Form23 auction window driven by the native transfer engine.

Standalone component preview; not yet wired into a full transfer day.

Squad

Contract renewal & loans

Original Form24 contract negotiation plus Form59 loan offers, listing, recalls and persistence.

Development fixture; exact original message-box and pixel fidelity are pending.

Squad

Player training

Native player development (senior growth, youth progress and older-player decline) applied to a saved career.

Development fixture around the verified development routines.

Match

Lineup window

Original Form87 lineup window with formations, tactics, captain, set-piece taker, kit choice and manual drag placement.

Saved-formations dialog and full Form87 parity remain unported; some operations are not connected.

Match

Penalty dialog

The attacking-manager Form34 penalty: taker selection, both timed stages, the verified shot rule and the result delay.

Attacking side only; sound playback and some human dialogs remain unfinished.

How this is verified

A separate, development-only oracle runs blocks of the original executable and records outputs, mutated memory and RNG draws.
Native modules are accepted only when they reproduce those records; the suite is executed in both Node.js and Chromium.
Browser previews expose their state through render_game_to_text() and explicitly report developmentProof: true, completeGame: false.

Known limitations

No whole-original-game or whole-career equivalence proof, and no complete-season or registered-edition gameplay.
Interactive forms are partial; some flows use automated test choices instead of the original dialogs.
Fonts, native controls, gradients and exact layouts are approximations, not certified pixel-identical.
Audio requests are recorded rather than played in the development previews.