It may be 100 games played, as I had more loses than wins. This would make the Akuma t-shirt 200 games played.

Update: it's not from the trophy. I don't have the 50 wins trophy and I just unlocked the Dan Home shirt.

I've heard that there would a connection between SFIV unlockables and Home stuff but I couldn't tell if it's specifically connected to the Trophies. I hope it is though.

PLAYSTATION Home, trophies, Sony, put them together.

You mean Achievement?

Dunno if this is a coincedence but I'm sure My Dan tee unlocked at the same time as my 50 wins trophy, as has my new black Akuma tee with the kanji on the front unlock after my 100 wins trophy. In any case I proceeded to make my Home self look as much like the Master of the Fist as possible. I'm now running around barefooted and looking like I'm in dire need of sleep.