Board Thread:Sonic News and Updates/@comment-2054358-20131222040143/@comment-2054358-20140102214528

1991 1992
 * 1989
 * the launch of the Sega Genesis.
 * Sonic cameos in Rad Mobile
 * Sonic's first game was released.
 * Sonic Patrol Car
 * Sonic Eraser
 * Sonic the Hedgehog 2.
 * 1993
 * Sonic CD
 * Premier of The Adventures of Sonic the Hedgehog and the SatAM cartoon.
 * SEGASonic the Hedgehog
 * Sonic Spinball
 * 1994
 * Sonic 3 and Knuckles.
 * Sonic Drift
 * 1995
 * Sonic Drift 2
 * 1996
 * 6-Pack
 * Sonic the Fighters
 * 1997
 * Sonic R
 * the Sonic Compilation on Genesis.
 * 1999
 * Launch of the Sega Dreamcast
 * the release of Sonic's first 3D platformer Sonic Adventure and the start of the Sonic Underground series.
 * 2000
 * Sonic Shuffle
 * the end of Sonic Underground.
 * 2001
 * the release of Sonic Adventure 2.
 * the discontiuation of the Dreamcast
 * SEGA becomes third-party business.
 * 2002
 * The release of the first Sonic game on a Nintendo console Sonic Adventure 2: Battle.
 * 2003
 * the start of Sonic X.
 * 2004
 * Sonic Heroes
 * 2005
 * Deem Bristow's death.
 * The Sonic characters are recast with their Sonic X voice actors
 * the release of Shadow's game.
 * 2006
 * the release of the horribly glitchy Sonic 06
 * A horrible port of Sonic the Hedgehog Genesis
 * the end of Sonic X.
 * Sonic Riders
 * 2007
 * the release of the first Sonic Wii game Sonic and the secret rings.
 * the first crossover with Mario in the Olympics.
 * Sonic was confirmed for Brawl.
 * 2008
 * Sonic Unleashed
 * Sonic Riders: Zero Gravity
 * Super Smash Bros. Brawl
 * 2009
 * Sonic and the Black Knight
 * Mario and Sonic at the Olympic Winter Games
 * 2010
 * Sonic and Sega All-Stars Racing
 * Sonic 4: Episode I
 * The 4Kids actors are replaced except Mike Pollack.
 * Sonic Colors
 * Sonic Free Riders
 * 2011
 * Sonic Generations
 * Mario and Sonic at the London 2012 Olympic Games
 * 2013
 * Nintendo makes a three game deal with Sega
 * Sonic Lost World
 * Mario and Sonic at the Sochi 2014 Olympic Winter Games
 * Sonic is confirmed for Super Smash Bros. 4

Man it is really tiring making that timeline...