Achilles is a Technick in Final Fantasy XII. The Technick can be bought for 8800 gil and the license costs 40 License Points. Achilles causes a target to be weak against a random element. However, most enemies are immune to the effects of Achilles.
In the International Zodiac Job System version, the Technick is found in a chest in the No. 4 Cloaca Spur area in the Garamsythe Waterway. It can be used by the job classes Archer, Machinist, Monk, Uhlan, and White Mage.