Sega Genesis Extras/Ultracore
Sega Genesis Extras/Ultracore stands as a defining action title on the Sega Genesis. With polished gameplay mechanics and memorable level design, this classic delivers an experience that has stood the test of time.
- Platform
- Mega Drive
- Genre
- Action
- Rating
- 4.2 / 5 (779)
- Last updated
Sega Genesis Extras/Ultracore Controls — Mega Drive Keyboard Keys
Default keyboard bindings for Sega Genesis Extras/Ultracore 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.
Sega Genesis Extras/Ultracore Longplay & Gameplay Videos
Watch a full playthrough of Sega Genesis Extras/Ultracore 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
"Sega Genesis Extras/Ultracore" Mega Drive longplay
External references
Frequently Asked Questions
What type of game is Sega Genesis Extras/Ultracore?
Sega Genesis Extras/Ultracore is a Action game for the Mega Drive, playable instantly in your browser — no downloads, no installs.
How can I play Sega Genesis Extras/Ultracore for free?
Open this page and click "Play Now" — Sega Genesis Extras/Ultracore runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Sega Genesis Extras/Ultracore in the browser?
No. Sega Genesis Extras/Ultracore streams from a public archive into a browser-side Mega Drive emulator. Nothing is installed on your computer.
Can I save my progress in Sega Genesis Extras/Ultracore?
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 Sega Genesis Extras/Ultracore 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 Sega Genesis Extras/Ultracore this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Sega Genesis Extras/Ultracore. 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.
