As reported by Joystiq, the PS3/PlayStation Network version of Final Fight Double Impact features a rather restrictive piece of digital rights management. In order to launch the game, you have to be logged into the PlayStation Network and if you're not, the game refuses to launch. This could be written off as a bug of some kind except for the fact that the error message that crops up tells you to sign in, suggesting Sony/Capcom intentionally included this 'feature.' Granted, you do have to log into the PlayStation Network to buy the title but as one commentator pointed out, logging in once does not mean you'll be logged in all the time. Curiously, the 360 version has no such restrictions, so you can play the game whether you're online or offline. But annoying as this feature may be, there may be method in Sony's madness.