ARCHIMEDES II

 is a deadly super laser inside Helios One in Fallout: New Vegas.

You can either pop Fantastic, NCR's tech, and use it yourself, or help him get it running and get on NCR's good side.

Characteristics
The weapon draws power from a solar reactor that's also linked to Vegas' power supply. Firing it will cause a massive shockwave to echo forth from the tower.

Appearances
appears in Fallout: New Vegas.