Here is the full list of all 15 Foxblade achievements.
Equip your first weapon
Drink your first potion
Break equipped weapon
Break equipped armor
Break equipped shield
Reach melee level to 10
Reach Melee level to 20
Reach Ranged level to 10
Reach Ranged level to 20
Hexcellent! Reach Magic level to 10
Reach Magic level to 20
Unlock an ability
Unlock Charge
Unlock Explosive Arrow
Unlock Arcane Vortex