What platforms is 20 em 1 on?

20 em 1 was released on Sega Master System/Mark III.

When did 20 em 1 release?

20 em 1 was first released on December 31, 1995.

20 em 1

Dec 31, 1995ArcadeSega Master System/Mark III

20 em 1 — frequently asked questions

What platforms is 20 em 1 on?: 20 em 1 was released on Sega Master System/Mark III.
When did 20 em 1 release?: 20 em 1 was first released on December 31, 1995.

About 20 em 1

20 em 1 (translated as 20 in 1) is a collection of 20 original games developed and published by Brazilian company Tectoy for the Sega Master System. The cartridge was only sold bundled with a certain version of Tectoy's Master System III Compact, and as such had no box of its own and was never sold outside Brazil. The games included in the collection were made for children and are relatively basic, ranging from driving to platformers to shoot-'em-ups. None of the terrible games have been named, being only identified by numbers.

Summary via IGDB.

Game details

Developer: Tec Toy
Publisher: Tec Toy
Game modes: Single player
Themes: Action

Details via IGDB.

Every version compared

Prices, contemporary reception and the studio credited for each release

Platform	Year	Loose	Complete	Sealed	Fake risk
Sega Master System	1995	—	—	—	Medium (look-alike)

Also released on: Sega Master System/Mark III. We haven’t priced or authenticated that version yet.

Collector value & authenticity

Sega Master System · PriceCharting sold data · Verified 2026-10-28

Loose

—

Complete

—

Sealed

—

How often it sells

Loose: rarely — fewer than one recorded sale a year
Complete: rarely — fewer than one recorded sale a year
Sealed: rarely — fewer than one recorded sale a year

Sales frequency from PriceCharting's completed-sale records, as of 2026-10-28.

Release record

Territory	Date
Brazil	1995

Source: Product numbers: MAME's Master System software list and the No-Intro serial records in the libretro database, published only where both agree on the same cartridge dump; Japanese numbers also checked against Sega Japan's software list. Board and ROM numbers: MAME's software list

Region: BR
Released: 1995
Authenticity: Med

Modern re-releases, such as Sega Ages and Virtual Console, are not tracked hereMedium look-alike risk

Sega Master System prices, all games & how to spot a fake

A Brazilian Tec Toy compilation of twenty games that came built into later Master System bundles, not a cartridge most people went out to buy.

20 em 1 (20 in 1) is a compilation from Tec Toy that lets you choose from twenty different games. It was released only in Brazil, in 1995, as a pack-in game included with later revisions of the Master System.

It is a curiosity of the Brazilian Tec Toy line.

Before you buy

This is the Brazilian Tec Toy cartridge and an official release. Sales of the cartridge on its own are rare, so expect to wait for a copy to appear and to judge condition from photos. The only fully documented Master System fake was a Brazilian Tec Toy cart, so ask for a photo of the board before paying.