A mish-mash of all the credits medleys in both the 3DS and PC/Console versions of Sonic Generations, with Shadow Generations added in!
Anything related to "Sonic" is owned and copyrighted by SEGA! I'm just making something for fun as a big fan of the series.
Found some inspiration from "Jacob S." to do my take on a medley, and while some others have done this before me, that still did not deter me from making something people could easily enjoy!
Timestamps for those that want to jump to a specific section in the series' history:
00:00 Beginning of Medley
00:14 Green Hill Zone (Sonic The Hedgehog)
00:34 Chemical Plant Zone (Sonic The Hedgehog 2)
01:08 Casino Night Zone (Sonic The Hedgehog 2)
02:08 Mushroom Hill Zone (Sonic & Knuckles)
02:52 Sky Sanctuary Zone (Sonic & Knuckles)
03:32 Emerald Coast (Sonic Adventure)
04:56 Speed Highway (Sonic Adventure)
05:37 City Escape (Sonic Adventure 2)
06:46 Radical Highway (Sonic Adventure 2)
07:55 Radical Highway [Shadow Gens] (Sonic Adventure 2)
09:30 Space Colony ARK (Sonic Adventure 2)
10:48 Seaside Hill (Sonic Heroes)
11:42 Rail Canyon (Sonic Heroes)
12:58 Water Palace (Sonic Rush)
13:55 Kingdom Valley (Sonic The Hedgehog 2006)
15:08 Crisis City (Sonic The Hedgehog 2006)
15:59 Rooftop Run (Sonic Unleashed)
16:56 Tropical Resort (Sonic Colors)
18:04 Planet Wisp (Sonic Colors)
18:45 Sunset Heights (Sonic Forces)
19:59 Chaos Island (Sonic Frontiers)
21:15 Ending of Medley