When did the first Sonic the Hedgehog game come out?
23-Jun-91
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
June 1991
1991
June 1991
1991
June 1991
1991
June 1991
1992
June 1991
1992
June 1991
1992
June 1991
1992
1992
Sega Genesis
June 1991
1992
1993
June 21, 1991
1992
June 1991
Sega Genesis
1993
1992
1987
June 13, 1991
June 1991
1993
Sega Genesis
1992
1987
June 3, 1991
June 30, 1991
1993
1 June 1991
June 21, 1991
1992
1987
1990
June 1992
June 1991
1993
1991.
1994
1992
1987
1990
June 13, 1991
1988
1993
June 1992
June 1991
1994
1992
1987
1990
1991.
June 21, 1991
1988
June 1991.
1993
May 1991
1994
1992
1987
June 1992
1990
1988
1991.
1993
June 1991
June 13, 1991
1994
1992
1987
June 1991.
June 30, 1991
1990
June 1992
1988
June 1993
1993
1991.
1994
June 21, 1991
1992
1987
1990
June 1991
1988
June 1991.
1993
1981
June 1992
1994
June 1993
1 June 1991
May 1991
1992
1987
June 3, 1991
1990
1991.
June 13, 1991
Sega CD
1988
June 1991
1993
1981
1994
May 3, 1991
1992
1996
1987
June 1991.
June 1992
1990
June 1993
1988
1991.
1993
1979
1981
1994
June 21, 1991
Sega CD
1992
1996
1987
1990
June 1988
June 1992
1988
June 1991
June 1993
1993
1979
1981
1 September 1991
1991.
1994
1992
1996
1987
June 1991.
June 30, 1991
1990
May 1991
June 13, 1994
1991-96
1 June 1992
1st
June 30, 1994
Sega CD
1988
June 21, 1994
1993
1979
June 1988
1995
1981
June 1992
June 1991
1994
June 1993
1992
1996
1987
1990
1991.
1 June 1991
1986
1988
June 1991.
1993
1979
1995
1981
1994
1st
June 21, 1991
1996