Jumper
20 Achievements
1000
Xbox 360
Gladiator
Get 20000 experience points.
50
How to unlock the Gladiator achievement in Jumper - Definitive Guide
xRogue, 5x
You will get this one near the end of the last level of your first time through the game. You get the most experience for long combos, as well as hitting the weak (green) spots on enemies.