INTRO:
I love this game, since the very first teaser trailer I felt it. This is it, after years of trail and error with gradual improvements from Secret rings to COLORS, SEGA found the Sonic formula that offers both exhilarating speed and interesting platforming. Thousands of gamers claiming they can't do it, it's impossible, Sonic is "dead". Well SEGA held on to the philosophy "what doesn't kill you makes you stronger" pretty tight and low and behold the world is graced with SONIC GENERATIONS!

Story:

Pretty much the excuse for tons of fun and creatively re-imagined levels throughout Sonic's iconic installments over the past 20 years. I WON'T spoil anything but I'll just say the story is very basic makes sense and is pretty enjoyable with all the cheesy humor you'd expect in sonic games these days.

Sound: I don't think I'd be giving anything away by saying the soundtrack is fantastic with various remixes and remastered Themes from sonics past. Many sonic fans can look forward to hearing "live and learn", Endless possibilities and of course :It Doesn't Matter"

Gameplay:

Nothing short of fantastic, 2 Sonics with their own unique style of "Classic" and "Modern" game-play. Classic Sonic is pretty much how he played in the golden age of the SEGA Genesis The speed is there but it's nothing compared to modern sonic and the platforming is creatively fun. Only issue with classic sonic is some times you have to get a running start on 2x2 pedestals to make it over a gap that is just out of reach of Classic sonics standard jump. This annoyance is amplified when your pressed for time to S Rank a side mission.Other then that Classic sonic is pretty fun and the inclusion of power ups adds to the fun and the already overwhelming nostalgia factor.
Modern Sonic's game play is almost nothing but Intense speed loops, trick rings, grind rails pretty much why I prefer Modern Sonic so much more over Classic sonic. quick reflexes and pacing will almost always get you a S rank on the first go, and there's nothing like being rewarded for your skills with short cuts, additional boost, and bursting the sound barrier to your favorite sonic track.

The bosses are just fantastic from the epic intros that are chalk full of shout out to their respective games to the spectacular re imagined look of Perfect Chaos never before have I felt so small since the fight with Bio-lizard in Sonic Adventure 2. You can expect most of the boss battles to be pretty easy though, even with the hard mode addition after the first play-through but despite the lack in difficulty for the majority they are very entertaining from beginning to end...well most of them. The Final boss is just a HUGE let down the game just kinda throws you in the water and you either sink or swim. Figuring out how to hurt him shouldn't take much difficulty but the game fails to give any indication to how to address certain situations. (Besides "it looks like a homing shot" EVERY-10- SECONDS!)When the boss starts teleporting his arms in front of you or what Super Classic Sonic is suppose to be used for. Overall the final boss felt rushed and very unsatisfying I was hoping for SEGA to go in a direction of making him morph into horrid doppleganger version of The Bio lizard, Metal Overlord, Dark Gaia etc. If I had more of a fun time fighting the easy as heck Egg Nega Wisp then it really shows how much they dropped the ball in the end.It bothers me alot cause this is such a huge foul stain on an ending to a darn near perfect game! (oh well his theme was awesome)

Overall:
This is a must have if your a sonic fan, period. I'm very curious as to whats next for the main Sonic series, until then great job SEGA.