A friend of mine just got his last ribbon today, trying to find out when he last played. Maybe it's updated recently today, but he's offline ATM so can't find out.
301 completed games to 100%
90.39% completion percentage
Last Achievement : Sonic Finale - Sonic & Knuckles (Xbox 360) - 25g
Last 100% Completion : Sonic & Knuckles (Xbox 360)
Thanks to Rajeanero for the avatar and Xerofox for the sig.