>>47623697(by Japanese release date, only 1 title per year)
1991 Sonic the Hedgehog
1992 Sonic the Hedgehog 2
1993 Sonic the Hedgehog Spinball
1994 Sonic the Hedgehog 3
1995 Sonic Drift Raing
1996 Sonic Blast
1997 Sonic Jam
1998 Sonic Adventure
1999 Sonic the Hedgehog Pocket Adventure
2000 Sonic Shuffle
2001 Sonic Adventure 2
2002 Sonic Advance 2
2003 Sonic Heroes
2004 Sonic Advance 3
2005 Shadow the Hedgehog (No Sonic, STOP THE COUNT!)
2006 Sonic Riders
2007 Sonic Rush Adventure
2008 Sonic Unleashed
2009 Sonic Chronicles: The Dark Brotherhood
2010 Sonic Colors
2011 Sonic Generations
2012 Sonic & Sega All-Stars Racing Transformed
2013 Sonic Lost World
2014 Sonic Boom: Rise of Lyric
2015 Sonic Dash 2: Sonic Boom
2016 Mario & Sonic at the Rio 2016 Olympic Games (Mario!?)
2017 Sonic Forces
2018 Sonic Mania Plus (only the add-on released that year)
2019 Team Sonic Racing
2020 Sonic at the Olympic Games Tokyo 2020 (mobile)
2021 Sonic Colors Ultimate (Remastered)
2022 Sonic Frontiers
2023 current year
Yes this is a list full of trash games, but there you go, you can play Sonic every year.