X-Blades
37 Achievements
1000
6-8h
Xbox 360
Light side
Execute Light form for the first time
20
How to unlock the Light side achievement in X-Blades - Definitive Guide
Munsie
Around the midway point of the game when you defeat the darkness within you, the ability to learn light spells will be unlocked. When you've acquired lightform (check the upgrades menu after this fight), activate it once to net this achievement.
SetsunaFSeiei
You will be able to use the Light form after defeating the Dark form. It'll show up in a display box to use it.