Board Thread:Questions and Answers/@comment-30300307-20170426071235/@comment-679780-20170426100303

There is only the one timeline in Sonic games. However there has been some branches that have been clipped off throughout the series.


 * Sonic CD was the first game to introduce time travel, however due to Little Planet having it's own flow of time different from the universe, the time shenanigans here are mostly contained and irrelevent to the whole timeline of the lore.


 * Sonic '06 was the second game that introduced time travel and was a rather complicated mess of time travel of characters going back and forth. The whole issue was resolved with Sonic and Elise going back before all the events of the game take place. Elise blew out the very flame that will cause everything to happen, thus ostracizing the events of the whole game from the timeline, with Sonic just visiting Soleanna for the festival.


 * Sonic Generations is the third game that involves time travel, however the reason was mostly for the game to serve as a tribute game. The Time Eater consumed momets from Sonic's personal history, in which Sonic must restore his own history by revisiting these moments in time. It's more of fixing the past than altering the future.


 * Sonic Forces will be the forth game in the over-all series to impliment time travel. This time Dr. Eggman goes back in time to remove Classic Sonic from the past, No Soic to stop Eggman means Eggman can conquer the world. For some reason Modern Sonic is stranded in the new timeline and must team up with his past self to restore the timeline to how it was.