Screenshots
Cosmo
宇宙
Cosmo is an action arcade game released in 1979 by a bootleg developer. The game places players in a space-themed environment where they control a spacecraft or character navigating against enemies and obstacles. Supporting two-player simultaneous or alternating play, Cosmo follows the fixed-screen or scrolling format common to late-1970s arcade titles. Players use a joystick and fire button to shoot down incoming threats while avoiding collision. As stages progress, enemy patterns increase in speed and complexity, raising the difficulty. Being a bootleg release, Cosmo is considered an unauthorized clone or variant of another arcade title from the era, and its hardware and ROM configuration reflect the low-cost production approach typical of unlicensed arcade boards circulating in that period.
- Developer
- bootleg
- Released
- 1979
- Platform
- Arcade
- Genre
- Action
- Players
- 2P
- Rating
- 4.8 / 5 (3.6K)
- Last updated
Cosmo Controls — Arcade Keyboard Keys
Default keyboard bindings for Cosmo 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.
Cosmo Longplay & Gameplay Videos
Watch a full playthrough of Cosmo 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
"Cosmo" Arcade longplay 1979
External references
Frequently Asked Questions
When was Cosmo released?
Cosmo was released in 1979 for the Arcade.
Who developed Cosmo?
Cosmo was developed by bootleg, available to play in your browser on RetroGameSpace.
How many players does Cosmo support?
Cosmo supports up to 2 players, ideal for couch co-op or competitive sessions on the Arcade.
What type of game is Cosmo?
Cosmo is a Action game for the Arcade, playable instantly in your browser — no downloads, no installs.
How can I play Cosmo for free?
Open this page and click "Play Now" — Cosmo runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Cosmo in the browser?
No. Cosmo streams from a public archive into a browser-side Arcade emulator. Nothing is installed on your computer.
Can I save my progress in Cosmo?
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 Cosmo 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 Cosmo this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Cosmo. 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.
