Greatest Heavyweights
Greatest Heavyweights remains one of the finest action experiences on the Sega Genesis. Its innovative design and addictive gameplay have earned it a permanent place in gaming history.
- Developer
- Acme Animation
- Released
- 1993
- Platform
- Mega Drive
- Genre
- Action
- Players
- 2P
- Rating
- 4.6 / 5 (1.2K)
- Last updated
Greatest Heavyweights Controls — Mega Drive Keyboard Keys
Default keyboard bindings for Greatest Heavyweights on our in-browser Mega Drive emulator. Plug in a USB or Bluetooth gamepad to auto-detect mappings, or rebind any key from the emulator settings menu.
| Keyboard | Console button | Typical use |
|---|---|---|
| ↑ | D-Pad Up | Move up |
| ↓ | D-Pad Down | Move down |
| ← | D-Pad Left | Move left |
| → | D-Pad Right | Move right |
| X | A | Primary action (jump / confirm) |
| Z | B | Secondary action (attack / cancel) |
| S | C | Tertiary action |
| A | X | Quaternary action |
| Q | Y | Fifth button |
| W | Z | Sixth button |
| Enter | Start | Start / Pause |
These bindings cover the 6-button Mega Drive controller. Most older titles only use buttons A/B/C; the extra X/Y/Z buttons matter for Street Fighter II and other 6-button fighters.
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
Greatest Heavyweights Longplay & Gameplay Videos
Watch a full playthrough of Greatest Heavyweights on Mega Drive before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"Greatest Heavyweights" Mega Drive longplay 1993
Greatest Heavyweights Cheat Codes
30 community-curated cheats for Greatest Heavyweights. Tick any to activate them automatically when you click "Play with cheats" — or copy a code into your own emulator.
-
Regional Lockout Bypass
AABT-AA3JEAAT-BL1TEAAT-AL1T+1 -
Rounds are 1 minute
BJ6A-ACD6 -
Rounds are 2 minutes
BJ6A-AED6 -
Rounds are 4 minutes
BJ6A-AJD6 -
Rounds are 6 minutes
BJ6A-AND6 -
Rounds are 9 minutes
BJ6A-AWD6 -
Rounds are infinitely long (must win by knockout)
CTXT-AA46 -
Infinite rounds (must win by knockout)
AJ4T-AA2A -
Set attributes to whatever you want when creating a new boxer
RH7A-A6YA -
Attributes aren't reduced after a fight
RH9A-A6TE -
Pick as many training items as you want
RH9T-A6VN+BM9T-AA9W -
Infinite Time
ANXT-AACN
Show 18 more cheats Show fewer
-
Developed For Use Only With Ntsc Genesis System
AEBT-AATW -
Player 2's face is missing (while boxing)
BBAA-BALT -
Automatically skips the "ready to Rumble" introduction
BADT-AAMT -
Leaves off the last letter of the name of both boxers (don't know if this can be used to rename boxers or not)
TBAT-AAER -
Fast Mode
KFKA-AACC -
Hit The CPU Anywhere
JVJA-AAXA -
Player 1 Is Invincible And Can Hit Anywhere
3ZCT-B3LC -
Player 2 Is Invincible And Can Hit Anywhere
33CT-BZLC -
Blocks Don't Work
E3CT-AA74 -
Infinite Power
FFF1A0:0D80FFF1A+0000D -
Infinite Speed
FFF1A2:0D80FFF1A+2000D -
Infinite Stamina
FFF1A4:0D80FFF1A+4000D -
Can Never Be Knocked Down Or Stun When Hit
AVJA-AA2J -
no Introduction On the Gameplay
AATA-AA1N -
Color code 1
8JXA-AASJ -
Both Players Has Powerful Punches
AASA-AAA2 -
Always Win The Fight
AAYA-AA3R -
Only Created Boxers Fight Fast
AART-AAT0
External references
Frequently Asked Questions
When was Greatest Heavyweights released?
Greatest Heavyweights was released in 1993 for the Mega Drive.
Who developed Greatest Heavyweights?
Greatest Heavyweights was developed by Acme Animation, available to play in your browser on RetroGameSpace.
How many players does Greatest Heavyweights support?
Greatest Heavyweights supports up to 2 players, ideal for couch co-op or competitive sessions on the Mega Drive.
What type of game is Greatest Heavyweights?
Greatest Heavyweights is a Action game for the Mega Drive, playable instantly in your browser — no downloads, no installs.
How can I play Greatest Heavyweights for free?
Open this page and click "Play Now" — Greatest Heavyweights runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Greatest Heavyweights in the browser?
No. Greatest Heavyweights streams from a public archive into a browser-side Mega Drive emulator. Nothing is installed on your computer.
Can I save my progress in Greatest Heavyweights?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original Mega Drive cartridge supported.
Does Greatest Heavyweights work on mobile devices?
Yes — the Mega Drive emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play Greatest Heavyweights this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Greatest Heavyweights. Game files are fetched on demand from publicly-accessible archives. You are responsible for compliance with your local laws and the bring-your-own-ROM principle.
