I have been a big fan of the ARG for Tron Legacy called Flynn Lives. It's a project by 42 Entertainment, who won an ARG award for the campaign. In the last installment, a short film on the Tron Legacy DVD/BluRay shows the "background" to the mythos that is the ARG. At the end, Sam wears a distressed Flynn Lives shirt. This is that shirt. The link is a sales link in case you like the design.