This comes while clearing the first few Missions.
But you can always replay a Mission and get more Exp. from it.
At the Mission Select Menu go hit the Bottom Tab, this will bring up
the Story Book where you can replay Missions. If you dont know the names
of the Mission you wanna replay simply use the Pictures next to them.
First site is always the Prologue, once you choosed the Mission hit X and
start from the Top most Section to start it.
Mission 1 gives about 1200 exp.
- Soldiers are worth 14~15 exp.
- Barricades are worth 3 exp. each.
Mission 2 is worth 1500 exp.
- Soldiers here are ranged from 14~17 exp.
- Boss will give you 140 exp.
This Trophie comes right at the Mission clear Menu once you ding Lv. 5.
I will put up a list of all Missions later for the Lv. 30 Trophie.