ABS armour is a special type of armour used by very few terrorists. In early stages it was full body armour. The first time it was used was by Rhoemer which was in Syphon Filter 3, when Gabe attempted to exact revenge on behalf of Ellis following the Costa Rican Incident. Rhoemer used it in a Galaxy transport with a helmet and armed himself with a shotgun. He was defeated by Gabe by using the UAS 12 or shotgun.