"A high-tech biomechanoid weapon."
The Axiom Disruptor is the first weapon that Trace finds. It fires a single, long-ranged, red energy shot per button press in the direction it is aimed. All other weapons found in the game are program discs that are utilized by this weapon.
The Axiom Disruptor was not built by Athetos, and some of the program discs may have been built by him, but not all.
The Axiom Disruptor is located in Eribu, in the room to the left of where Trace awakens.