Jumper
20 Achievements
1000
Xbox 360
Speed Demon
Complete a play through of the game in record time.
50
How to unlock the Speed Demon achievement in Jumper - Definitive Guide
xRogue, 5x
There is no game clock and nothing to tell you how quickly you finished the game, but the entire thing will only take 2-3 hours and that will definitely net you the achievement. I wasn't even trying to go quickly and still got this.