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Play Heavyweight Champ (US_EU edition) Online
Heavyweight Champ
Play Heavyweight Champ online on Master System. Guide Stevie Davis through the rankings, improve his skills and time guards, body blows and Super Punches.
Browser play

Sega Master System — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| 1 / START | X |
| 2 | Z |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Heavyweight Champ
Quick start
Press 1 or 2, choose Slow with up/down and confirm. Select one-player play and enter the ring. Try 1 and 2 for left and right punches, up to guard the head and down to guard the body. Use down+1 for a body punch before attempting a Super Punch.
Controls
Player 1: left/right moves; up guards the head, down guards the body; up-left sways back, down-left ducks. 1 punches left, 2 punches right; down+1/2 hits the body. For an available Super Punch, hold up or down with 1+2 until the gauge fills, then release when in position. Menus: up/down selects, 1/2 confirms.
Heavyweight Champ — About this game
Heavyweight Champ puts you in the corner of Stinging Stevie Davis as he works toward champion Keith Gibson. Head and body guards, a backward sway and low punches give you ways to interrupt an opponent without trading every hit. Super Punches add a stronger attack, but they are a limited resource and require time to charge. Victories earn points for power, recovery, footwork and Super Punch ability, letting you prepare for tougher fighters. Recovery also affects how much stamina returns between rounds. Choose a slower speed while learning the controls, then try the faster setting when you can defend reliably. A second player can select an opposing boxer for a direct bout. Look for an opening before charging a big blow, and use the gaps between attacks to reposition.
Heavyweight Champ Game manuals
Cheats
No cheats have been added for this edition.
Player 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 · segaMS
- 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.