| Aka: | Double Target |
| Console: | Sega Master System |
| TV Standard: | NTSC-U |
| Country: | United States of America |
| Developer(s): | Sega R&D2 |
| Publisher(s): | Sega of America, Inc. |
| Release Date: | 1987-04-15 |
| Players: | 2 |
| Co-op: | Yes |
| ESRB: | E10+ - Everyone 10+ |
| Type: | Action, Shooter, Platform |
If you hate aliens, you'll love Quartet! You see, space colony Number Nine is being threatened by an invasion of the most dangerous kind. Alien attack. And the place is crawling with them. These vicious, vile parasites have even managed to confiscate the casket of the late great Queen Cynthia. It's your job to exterminate these treacherous creatures. To return the casket to its hallowed tomb. And save the colony from certain collapse. You'll have special equipment to help you along the way. Like a supersonic jet engine, a special bomb, missiles and a magic key. But time is running out. So don't just stand there thinking about it. Get on it. And get rid of this gruesome group. For good!
Game Player of Quartet on Sega Master SystemGenerally, 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 |
