Screenshots
Mutant Night
变异之夜
Mutant Night is a side-scrolling action game released in 1987 by UPL for arcades. Players control a character moving through stages populated by grotesque mutant enemies, attacking foes and avoiding hazards. The game features a horizontal scrolling structure with multiple stages, each filled with waves of bizarre creatures. Players use a joystick and buttons to jump and attack, fighting through enemies to reach stage goals. UPL incorporated a variety of enemy types with distinct movement patterns, keeping combat varied across levels. The game's visual style leans into sci-fi horror themes, with colorful, outlandish creature designs characteristic of UPL's arcade output during this period.
- Developer
- UPL
- Released
- 1987
- Platform
- Arcade
- Genre
- Action
- Rating
- 4.8 / 5 (4.6K)
- Last updated
Mutant Night Controls — Arcade Keyboard Keys
Default keyboard bindings for Mutant Night on our in-browser Arcade 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 |
|---|---|---|
| ↑ | Joystick Up | Move up |
| ↓ | Joystick Down | Move down |
| ← | Joystick Left | Move left |
| → | Joystick Right | Move right |
| X | Button 1 | Primary action (jump / confirm) |
| Z | Button 2 | Secondary action (attack / cancel) |
| S | Button 3 | Tertiary action |
| A | Button 4 | Quaternary action |
| Q | Button 5 | Fifth button |
| W | Button 6 | Sixth button |
| 5 | Insert Coin | Insert coin |
| 1 | 1P Start | Start / Pause |
Coin and Start are convention "Insert Coin: 5" and "1P Start: 1". Some arcade boards expect specific button mappings — check the in-game prompts on coin-up.
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
Mutant Night Longplay & Gameplay Videos
Watch a full playthrough of Mutant Night on Arcade before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"Mutant Night" Arcade longplay 1987
External references
Frequently Asked Questions
When was Mutant Night released?
Mutant Night was released in 1987 for the Arcade.
Who developed Mutant Night?
Mutant Night was developed by UPL, available to play in your browser on RetroGameSpace.
What type of game is Mutant Night?
Mutant Night is a Action game for the Arcade, playable instantly in your browser — no downloads, no installs.
How can I play Mutant Night for free?
Open this page and click "Play Now" — Mutant Night runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Mutant Night in the browser?
No. Mutant Night streams from a public archive into a browser-side Arcade emulator. Nothing is installed on your computer.
Can I save my progress in Mutant Night?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original Arcade cartridge supported.
Does Mutant Night work on mobile devices?
Yes — the Arcade emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play Mutant Night this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Mutant Night. 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.
