In what year did the first Sonic the Hedgehog game come out?
1991
1991
1991
1991
1991
1987
1990
1991
1982
1987
1990
1988
1991
1982
1986
1987
1993
1990
1988
1991
1982
1986
1985
1987
1993
1990
1988
1991
1982
1986
1985
1987
1993
1990
1988
1991
1982
1986
1992
1985
1987
1993
1990
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1993
1990
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1993
1990
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1993
1990
1981
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1994
1993
1990
1981
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1983
1992
1985
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1983
1992
1985
1996
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1980
1983
1992
1985
1996
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1980
1983
1992
1985
1996
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1980
1983
1992
1985
1996
1987
1994
1993
1995
1990
1981
1988
1989
1984
1991
1982
1986
1980
1983
1992
1985