WipEout HD

Self explanatory, you might get this during the campaign if you get over 50,000 on zone mode in the required tracks. If you don't however go to Racebox and set up a Zone game, now choose one of the tracks and then beat the score of 50,000 (score is at the top of the screen during the event). To get 50,000 quicker, get as many perfect laps as you can. You can check how much you have on the tracks by looking at the track name on Racebox and the you will notice the Leaderboard below, you need to get a score of 50,000 down there. Most the tracks are easy but Corridon 12 can cause problems because of the way it's set out, all are really easy to reach 50,000 on though. The trophy will unlock upon reaching 50,000 on those 4 tracks in Zone mode.