Last game you beat

[JiraiyaSennin]

About a week ago I finally went back to Sonic Genreations on the Xbox 360 to fully finish the game.  

I got an S rank in Act 1 and Act 2 in all 9 Zones. 

I got an S rank in Act 1 and Act 2 in all 90 challenges.

I got an S rank for every Rival, in both Normal Mode and Hard Mode.

I got an S rank for every Boss, in both Normal Mode and Hard Mode.

I also collected all of the red star rings for every Zone, which is 5 red rings per act and each Zone has 2 acts adding up to 90 red rings altogether.

And last but not least I unlocked every achievement

Usually when I'm trying to 100% a game it can be tedious collecting and beating everything, but this was very fun especially because I hadn't played it for a few years.
My favorite parts were without a doubt the Classic Sonic Acts, they feel like what we were supposed to get from early 3D Sonic games. I would personally love if they translated the Classic Sonic parts into a full game.
I feel like if SEGA wants to succeed with the next big Sonic game they need to learn from Sonic Genreations, because it's probably their best 3D Sonic game.