I learned "Alien" this way. Its a little different from the others.

x=mute

Intro
E-------------------------------------------------------------------------------
B-------------------------------------------------------------------------------
G------14141212--888--14141515-------14141212--888--14141515--------------------
D-555--x-x-x-x---888--x-x-x-x---555--x-x-x-x---888--x-x-x-x---------------------
A-555--12121010--666--12121313--555--12121010--666--12121313--------------------
E-333---------------------------333---------------------------------------------

Verse
E-------------------------------------------------------------------------------
B-------------------------------------------------------------------------------
G-------7777--8888--------------7777--8888--------------------------------------
D-5555--7777--8888--8888--5555--7777--8888----7-8-7-----------------------------
A-5555--5555--6666--8888--5555--5555--6666--8-5-6-5-----------------------------
E-3333--------------6666--3333--------------6-----------------------------------

Chorus
E-------------------------------------------------------------------------------
B-------------------------------------------------------------------------------
G-88888888--1010101010101010--77777777------------------------------------------
D-88888888--1010101010101010--77777777--55555555--------------------------------
A-66666666--8-8-8-8-8-8-8-8---55555555--55555555--------------------------------
E---------------------------------------33333333--------------------------------