I have to give a shot to either Sonic Generations [since I don't have Sonic X Shadow Generations but also wouldn't trust on my PC being able to run it] or Shadow the Hedgehog [the game - I had played snippets of it long ago, but like SA2, I actually never have sat down go through everything myself].

Thanks for reading - I wonder if you have watched the third Sonic movie at this point...if you really like Shadow it will be quite the fun watch for you :]