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Play Bygone (prototype) (English) Online
Bygone (prototype)
Play Bygone (prototype) online. Explore the cavern and collect parts that change the robot’s form.
Browser play

Arcade — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| RetroPad A / B / X / Y | Z / X / A / S |
| L / R | Q / E |
| Insert coin | V |
| START | Enter |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Bygone (prototype)
Quick start
- Explore the next part of the cavern.
- Avoid enemies and terrain hazards.
- Collect a useful robot part.
- Adapt to the changed form and continue toward the next section.
Controls
Use the four-way joystick to move. Use Buttons 1 and 2 for the two registered actions; their separate functions are not inferred from the shared driver labels.
Bygone (prototype) — About this game
The preserved Bygone prototype follows a small spring-bodied robot through a cavern. Collecting parts changes the robot into other forms, giving progress a transformation element as well as movement through the underground passages. The character can attach to and climb along the scenery while searching for the next route. Its encounters lead toward a large cyclops-like opponent rather than a conventional sequence of separate fixed screens.
Cheats
Infinite Credits
1 "开启", 0, 0xE0FE, 0x09Infinite spring energy
1 "开启", 0, 0xE004, 0x03, 0, 0xE005, 0x80Infinite hull energy
1 "开启", 0, 0xE008, 0x04, 0, 0xE009, 0xFFInfinite Lives PL1
1 "开启", 0, 0xE00D, 0x18Infinite Lives PL2
1 "开启", 0, 0xE00E, 0x18Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · arcade
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.