When did the first Sonic the Hedgehog game come out?
23-Jun-91
1987
1987
1987
1991
1990
1987
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1991
1990
1987
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1986
1990
1987
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1987
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1982
1991
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1990
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1987
1989
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1982
1991
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1990
1985
1984
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1987
1989
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1983
1982
1991
1986
1990
1985
1984
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1987
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1983
1982
1991
1986
1995
1990
1985
1984
1992
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1987
1989
1988
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1983
1982
1991
1986
1995
1990
1985
1984
1992
1993
1987
1989
1988
1994
1983
1982
1991
1986
1995
1996
1990
1985
1984
1992
1993
1987
1989
1988
1994
1983
1982
1991
1986
1995
1996
1990
1985
1984
1992
1993
1987
1989
1988
1994
1983
1982
1991
1986
1995
1981
1996
1990
1985
1984
1992
1993
1987
1980
1989
1988
1994
1983
1982
1991
1986
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1981
1996
1990
1985
1984
1992
1993
1987
1980
1989
1988
1994
1983
1982
1991
1986
1995
1981
1996
1990
1985
1984
1992
1993
1987
1980
1989
1988
1994
1983
1982
1991
1986
1995
1981
1996
1990
1985
1984
1992
1980
1987.
1987.
1990s
1990s