In what year was the first Sonic the Hedgehog game released?
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1991
1992
1992
1992
1992
1992
1992
1992
1993
1987
1992
1993
1994
1991.
1987
1992
1993
1994
1987
1991.
1992
1993
1994
1987
1992
1993
1991.
1994
1988
1987
1992
1993
1994
1988
1991.
1987
1992
1993
1994
1990
1988
1987
1991.
1992
1993
1994
1990
1988
1987
1992
1991-90
1993
1991.
1991 for Sega
1994
1990
1988
1987
1992
1993
1994
1990
1988
1991.
1991, Sega
1991-90
1991-92
1987
1992
1993
1994
1990
1988
1991 for Sega
1987
1991-91
1991.
1992
1991-90
1993
1994
1991-92
1990
1988
1991-96
1987
1991, Sega
1991-88
1992
1991 – 1991
1993
1991.
1994
1990
1991-91
1988
1991-90
1991-92
1987
1992
1993
1991-96
1991-Jun
1994
1990
1988
1991.
1991 – 90
1987
1991-91
1995
1991 -
1991-90
1993
1991 for Sega
1994
1991-92
1990
1991, Sega
1988
1991-88
1991-96
1987
1995
1991.
1991 – 1991
1993
1994
1991 – 90
1990
1991-91
1988
1991 -
1991-Jun
1991-90
1991-92
1987
1989
1995
1991, Sega
1991-88
1993
1991.
1994
1990
1988
1991 Sega Genesis
1996
1987
1989
1991-91
1995
1991,
1991 -
1991-90
1993
1994
1991-92
1991 –
1990
1979
1988
1991.
1996
1991 – 1991
1987
1989
1995
1991-Jun
1991 – 90
1993
1991-96
1994
1991 and 1991
1991-82
1991,
1990
1979
1991-91
1991, Sega
1988