| Console: | Sega Master System |
| TV Standard: | Region Not Set |
| Developer(s): | Atari Games |
| Release Date: | 1997-01-01 |
| Players: | 1 |
| Co-op: | No |
| Type: | Action, Sports |
20 em 1 (20 in 1) is a compilation of twenty previously unreleased games in a single cartridge, which came bundled with Tec Toy's Master System III Compact (Master System II in Europe and US).
The game has only two songs, one played at the title screen, the other played during all gameplay. All the text in the game is in Portuguese.
Game Player of 20 em 1 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 |
