Simplify the following text for a Grade 6 native English-speaking person.
Original: The Master System ( abbreviated to SMS ) is a third-generation video game console that was manufactured and released by Sega in 1985 in Japan ( as the Sega Mark III ) , 1986 in North America and 1987 in Europe .
Simplified: The Sega Master System is a video game console made in 1986 . It was not very popular in North America and Japan .