15mm ARTEMIS rail gun

The 15mm ARTEMIS rail gun is a weapon that was to appear in Van Buren, the canceled Fallout 3 by Black Isle Studios. It also appears in the Van Buren tech demo game files.

Background
ARTEMIS was an unfinished weapons project by Poseidon Energy and the Enclave, designed as a late-game weapon that could be crafted by characters with a high Science skill, using schematics from Mesa Verde.

Location
While it doesn't appear in the Van Buren tech demo, it is still present in the game files and can be spawned with the console command, but remains a non-functional weapon.