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Space Intruder
太空入侵者
Space Intruder is a fixed-screen action game released in 1980 by Shoei for arcade cabinets. Drawing clear inspiration from Space Invaders, the game tasks players with controlling a laser cannon at the bottom of the screen to shoot descending waves of alien enemies. Players maneuver left and right while firing upward, using defensive barriers for cover. The game supports two players, allowing alternating play. Enemy formations advance downward as they are picked off, increasing in speed as their numbers dwindle. Each cleared wave leads to a new formation, maintaining consistent challenge. The arcade cabinet presents the action with straightforward controls typical of the era, making it accessible while still demanding accuracy and quick reflexes.
- Developer
- Shoei
- Released
- 1980
- Platform
- Arcade
- Genre
- Action
- Players
- 2P
- Rating
- 4.7 / 5 (3.6K)
- Last updated
Space Intruder Controls — Arcade Keyboard Keys
Default keyboard bindings for Space Intruder 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.
Space Intruder Longplay & Gameplay Videos
Watch a full playthrough of Space Intruder 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
"Space Intruder" Arcade longplay 1980
External references
Frequently Asked Questions
When was Space Intruder released?
Space Intruder was released in 1980 for the Arcade.
Who developed Space Intruder?
Space Intruder was developed by Shoei, available to play in your browser on RetroGameSpace.
How many players does Space Intruder support?
Space Intruder supports up to 2 players, ideal for couch co-op or competitive sessions on the Arcade.
What type of game is Space Intruder?
Space Intruder is a Action game for the Arcade, playable instantly in your browser — no downloads, no installs.
How can I play Space Intruder for free?
Open this page and click "Play Now" — Space Intruder runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Space Intruder in the browser?
No. Space Intruder streams from a public archive into a browser-side Arcade emulator. Nothing is installed on your computer.
Can I save my progress in Space Intruder?
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 Space Intruder 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 Space Intruder this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Space Intruder. 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.
