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