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Killer Comet
Killer Comet is an arcade action game released in 1980, developed by GamePlan under a Centuri license. Players control a spaceship defending against waves of incoming comets and enemy spacecraft. Using a rotational control scheme, the ship can spin and fire to destroy threats approaching from multiple directions. The game supports two players, allowing alternating play on a single cabinet. Stages escalate in difficulty as more comets and enemies appear simultaneously, demanding faster reaction times. The objective is to survive each wave and accumulate points by destroying incoming objects. Killer Comet fits within the space shooter genre popular in early arcade cabinets, sharing mechanical similarities with titles like Asteroids while offering its own attack patterns and enemy behaviors.
- Developer
- GamePlan (Centuri license)
- Released
- 1980
- Platform
- Arcade
- Genre
- Action
- Players
- 2P
- Rating
- 4.6 / 5 (4.8K)
- Last updated
Killer Comet Controls — Arcade Keyboard Keys
Default keyboard bindings for Killer Comet 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.
Killer Comet Longplay & Gameplay Videos
Watch a full playthrough of Killer Comet 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
"Killer Comet" Arcade longplay 1980
External references
Frequently Asked Questions
When was Killer Comet released?
Killer Comet was released in 1980 for the Arcade.
Who developed Killer Comet?
Killer Comet was developed by GamePlan (Centuri license), available to play in your browser on RetroGameSpace.
How many players does Killer Comet support?
Killer Comet supports up to 2 players, ideal for couch co-op or competitive sessions on the Arcade.
What type of game is Killer Comet?
Killer Comet is a Action game for the Arcade, playable instantly in your browser — no downloads, no installs.
How can I play Killer Comet for free?
Open this page and click "Play Now" — Killer Comet runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Killer Comet in the browser?
No. Killer Comet streams from a public archive into a browser-side Arcade emulator. Nothing is installed on your computer.
Can I save my progress in Killer Comet?
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 Killer Comet 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 Killer Comet this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Killer Comet. 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.
