Once you’ve finally emptied the vault of all enemies, head back out to Wasteland and you’re going to want to set your Pip-Boy for Beantown Brewery. Beantown Brewery is on the west side of the map and can be found north of Oberland Station. Walk east and south around this the brewery and you should see a flash in the sky as a UFO speeds past you. If you see this, you know that the event has been triggered.
As soon as you see this sign of confirmation, you want to start heading south from Beantown Brewery until you see a cave and a crash site. That flash in the sky was the last flight that poor alien will ever have. On the up side, it means you’re about to snag his blaster! Just to the east of the crash site you should find another secondary location marker called ‘Cave’. Simply head in and see the poor slimy guy looking a bit worse for wear. Give him a couple shots of your weapon and he’ll go down. Loot the alien’s body and the Alien Blaster is yours.
This is one of the most powerful weapons in the game and takes Alien Blaster Rounds as its ammo. Top tip, though, simply modify the weapon back at one of the Weapon Benches and you can change it to take fusion cells. You now have a much more common source of ammo for an incredible weapon.
Have you picked up the alien blaster? Enjoying Fallout 4? Let us know in the comments below.