
20 in 1 is a compilation of 20 original games created and released by the Brazilian company Tectoy for the Sega Master System. The cartridge was exclusively sold as part of a specific edition of Tectoy's Master System III Compact, meaning it didn't have its own packaging and was never available outside Brazil. The games in the collection are aimed at children and feature simple gameplay, spanning genres like racing, platforming, and shoot-'em-ups. None of the games are given names; they are only labeled with numbers.

| Audio | Subtitles | Interface | |
|---|---|---|---|
| Português (Brasil) | ✓ |