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%.

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). The ranges are in approximately the center of the map north-to-south, and on the easter side (see Weapons lab for a map). Activating the switch closest to the door summons Brahmin, while activating the far switch teleports abductee enemies to a second range.

There are 4 types of enemies on second range. At least one of each type must be killed (by yourself or other summoned creature) to get the perk: Raiders Yao guai or deathclaw Sentry bots Giant or albino radscorpions

It may take some time to get one of each from last 3 groups.

Affected weapons
This is a list of weapons that are affected by Xenotech Expert. All alien weapons are affected except the Electro-Suppressor.
 * Alien atomizer
 * Alien blaster
 * Alien disintegrator
 * Atomic pulverizer
 * Destabilizer
 * Drone cannon
 * Drone cannon Ex-B
 * Firelance
 * Shock baton
 * Captain's sidearm

Bugs

 * It is possible for the perk not to trigger, even after several switch activations. To remedy this, simply save and then load the save. After loading, activate the switch again and the perk should unlock.