| Console: | Nintendo Entertainment System (NES) |
| TV Standard: | NTSC |
| Country: | United States of America |
| Developer(s): | Capcom |
| Publisher(s): | Capcom |
| Release Date: | 1991-12-06 |
| Players: | 1 |
| Co-op: | No |
| ESRB: | E - Everyone |
| Type: | Action |
NTSC Prototype of Mega Man 4. Has many differences, including all of the cutscene dialogue. Enemies are more aggressive likely due to not being finished completely. There's also a few bugs with abilities and power ups. There's likely a lot more differences undiscovered thus far.
Game Player of Mega Man 4 (Prototype) on Nintendo Entertainment System (NES)Generally, you can review the controls (keyboard) setting during each game in the screen before it starts. Use the arrow keys and “Z”, “X”, “A”, “S”, “Q”, “E” buttons to play, or customize yourself with your gamepad or keyboard.
| Keyboard | Controls |
| ← → ↑ ↓ | Directions for LEFT, RIGHT, UP, DOWN |
| Enter ↵ | START |
| Shift | SELECT |
| Z | A |
| X | B |
| A | X |
| S | Y |
| Q | L |
| E | R |
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