E----------------------------------------------------------------------------------------------------------
B----------------------------------------------------------------------------------------------------------
G----------------------------------------------------------------------------------------------------------
D-------7----------9-------------------10-------------12---------12-10-9-----------------------------------
A--000-------000---------000------------------000------------000-------------------------------------------
E----------------------------------------------------------------------------------------------------------

play twice, then

E----------------------------------------------------------------------------------------------------------
B----------------------------------------------------------------------------------------------------------
G----------------------------------------------------------------------------------------------------------
D-----------7-7-------7-7--------9-9-----------10-10--------12-12-----------12-10-9------------------------
A-----000-------000--------000-------------000----------000-----------000----------------------------------
E----------------------------------------------------------------------------------------------------------
     -------1x---------/ -----2x-----/ ----2x----/ --------------1x------------/



E----------------------------------------------------------------------------------------------------------
B----------------------------------------------------------------------------------------------------------
G----------------------------------------------------------------------------------------------------------
D------7-7---------9-9--------10-10--------12-10-9---------------------------------------------------------
A-000------000------------000----------000-----------------------------------------------------------------
E----------------------------------------------------------------------------------------------------------

play twice

then back up to first riff and play that twice

then play second riff twice

then play first riff again and play that twice, but speed up the second time

and then thats it...enjoy!

(this is my first tab..so report any errors..thanks)
(and i know..i dont have a life tabbing the halo theme song..but what can i say..i like it)