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Mega Man 4
洛克人：4
Mega Man 4, developed by Capcom in 1992, is a side-scrolling action platformer for the NES. The player controls Mega Man as he battles robot masters across eight selectable stages. Each defeated robot grants Mega Man a unique weapon usable against subsequent enemies. The game features tight platforming mechanics, requiring precise jumping and timing to navigate hazardous terrain and enemy patterns. Players progress through levels filled with spikes, pits, and projectile-firing adversaries. The password system allows players to save progress and replay completed stages. After clearing all eight initial stages, a final boss confrontation awaits. Mega Man 4 maintains the series' core gameplay loop of exploration, combat, and weapon collection.
- Developer
- Capcom
- Released
- 1992
- Platform
- NES
- Genre
- Action
- Players
- 1P
- Rating
- 4.5 / 5 (5.9K)
- Last updated
Mega Man 4 Controls — NES Keyboard Keys
Default keyboard bindings for Mega Man 4 on our in-browser NES 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) |
| Enter | Start | Start / Pause |
| Shift | Select | Select / Mode |
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
Mega Man 4 Longplay & Gameplay Videos
Watch a full playthrough of Mega Man 4 on NES before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"Mega Man 4" NES longplay 1992
Mega Man 4 Cheat Codes
30 community-curated cheats for Mega Man 4. Tick any to activate them automatically when you click "Play with cheats" — or copy a code into your own emulator.
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Infinite energy [invincibility]
EUNGZAEP -
Start With Infinite Time Stopper [Bright Man]
KUNGZAEO -
Start With Infinite Dive Missile [Dive Man]
NUNGZAEP -
Start With Infinite Skull Barrier [Skull Man]
SUNGZAEO -
Start With Infinite Ring Boomerang [Ring Man]
EUNGZAEO -
Start With Infinite Drill Bombs [Drill Man]
OUNGZAEO -
Start With Infinite Rain Flush [Toad Man]
KUNGZAEP -
Start With Infinite Dust Crusher [Dust Man]
XUNGZAEO -
Start With Infinite Pharaoh Shot [Pharaoh Man]
UUNGZAEO -
Start With Infinite Rush Marine
UUNGZAEP -
Start With Infinite Rush Jet
XUNGZAEP -
Start With Infinite Balloons
VUNGZAEP
Show 18 more cheats Show fewer
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Start With Infinite Wire
SUNGZAEP -
Start With Infinite Rush Coil
OUNGZAEP -
Start With Infinite E-Tanks
OSTOTV -
Start With 200 E-Tanks
PETOTV -
Start With All Weapons
ETGPUO -
Kill An Enemy In One Shot [Not Bosses - Can't Slid
ZTGAAP -
Small Health Capsules Refill Health Completely
TVZLXG -
Large Health Capsules Refill Health Completely
TVZLOG -
Small Weapon Capsules Refill Weapon Completely
TVZLKG -
Large Weapon Capsules Refill Weapon Completely
TVZLUG -
Move Superfast
ALIENE -
Walkthru [Can Get Hurt Once In Awhile]
YELAZO -
When You Get Hit, Move A Lot Faster For A Couple Of Seconds
VKTALU -
Rapid Fire And The Bosses Barely Move
PILAUI -
Charge M. Buster And You'll Have Rapid Fire
OKYAKK -
Enemies Drop Large Weapon Capsules Everytime
OKPLOK -
Enemies Drop A 1-Up Everytime
OKPLEK
External references
Frequently Asked Questions
When was Mega Man 4 released?
Mega Man 4 was released in 1992 for the NES.
Who developed Mega Man 4?
Mega Man 4 was developed by Capcom, available to play in your browser on RetroGameSpace.
How many players does Mega Man 4 support?
Mega Man 4 is a single-player Action game for the NES.
What type of game is Mega Man 4?
Mega Man 4 is a Action game for the NES, playable instantly in your browser — no downloads, no installs.
How can I play Mega Man 4 for free?
Open this page and click "Play Now" — Mega Man 4 runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Mega Man 4 in the browser?
No. Mega Man 4 streams from a public archive into a browser-side NES emulator. Nothing is installed on your computer.
Can I save my progress in Mega Man 4?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original NES cartridge supported.
Does Mega Man 4 work on mobile devices?
Yes — the NES emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play Mega Man 4 this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Mega Man 4. 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.
