If you try and play a pre-owned PlayStation Vita game, you'll get a rather alarming message from Sony. Here's what it says:

"You cannot earn trophies in this application. Only the first player to use an application can earn trophies. To earn trophies, you must link the Sony Entertainment Network account of the first player to use this application with the PS Vita system."

At first, it sounds like a sneaky piece of digital rights management from Sony, which in one fell swoop could cut off CEX, sink eBay, and demolish the pre-owned shelf in your local GAME. Because, if you can't get shiny digital trophies in a game, what's the point in even playing?

All hope is not lost, though. It's actually quite easy to get trophy functionality back in a pre-played game, as long as you know what you're doing. Follow our guide, and you'll be racking up Platinums in no time.