Xenotech Expert

Xenotech Expert is a perk which is added to Fallout 3 in the Mothership Zeta add-on.

It increases the damage done with alien weapons by 20%, including the Alien Disintegrator, the Alien Atomizer, the Alien Blaster, and the Firelance if the player has found it in the Wasteland.

Obtaining
To get this perk you must find a "shooting range" in the weapons lab (A room with an alien atomizer and an alien disintegrator next to a switch) Activate the switch and keep killing the raiders and deathclaws with an alien weapon (works with drone cannon and drone cannon Ex -8) until the perk unlocks