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.
Sapo Xulé: S.O.S. Lagoa Poluida is a retooled version of Astro Warrior, released by Tec Toy in 1996 for a Brazilian audience. It was later brought to Portugal.
S.O.S. Lagoa Poluida is virtually identical to Astro Warrior, but now takes place underwater rather than in Space. Astro Warrior had previously been released in Brazil making this the second outing of this game in that region - Portugal did not see Astro Warrior as a stand-alone release, instead in the form of the combo cartridge, Hang-On / Astro Warrior.
Dallyeora Pigu Wang (달려라 피구왕) translates roughly to "Run Dodgeball King" and the game is often referred to as "Dodgeball King" in non-Korean speaking communities.
Geraldinho is a retooled version of Teddy Boy, produced by Tec Toy and released exclusively in Brazil. The main character was replaced by "Geraldinho", a popular comics character created by Glauco Villas Boas, a famous brazillian illustrator and cartoonist, for children's section of the newspaper "Folha de São Paulo" called "Folhinha". This game was another attempt of Tec Toy to suit the brazilian children audience, using characters from popular comics, series and magazines.
Twenty-four teams from around the globe have come to participate in this soccer showcase. Pick one and match your skills against the computer in an exhibition match, take on a friend, or put it all on the line in the World Cup Tournament! The action never stops!
The Master System port of Wonder Boy in Monster World is somewhat different. It features re-drawn graphics, fewer and shorter stages, and a complex password system (approximately 40 digits in length) rather than battery-backed save data.
Chapolim X Drácula: Um Duelo Assustador is an authorized "hack" of Ghost House, with Ghost House's hero, Mick, replaced by Chapolim, a famous Mexican character from a TV series.
The Flash is an action video game based on the DC Comics superhero of the same name. It was developed and manufactured by Sega and Probe Entertainment for the Sega Master System in 1993. The game's release followed approximately two years after the cancellation of The Flash TV series on CBS.