Here are some Sonic games that I own that I may have mentioned before:

Sonic Rush

Sonic Unleashed (Wii)

Sonic Colors (Wii and DS)

Sonic Generations (3DS)

Mario and Sonic at the Olympic Games/Winter Olympic Games (both the DS versions)

Sonic and Sega All Stars Racing (DS)

Sonic games I want to own:

Sonic the Hedgehog (2006)

Sonic Unleashed

Sonic Generations

I am wanting to get the 360 versions as I said I wanted to get an Xbox 360.