Iron Maiden - The Trooper. When it comes to metal, the British are the best in the world. Pioneers like Iron Maiden wrote the rule book as far as metal is concerned and despite a combined age totalling at least 400 years (if you count Eddie the Ed) the band are still churning out hits today. Based in E minor, the powerful descending melody line that introduces the song is played on two guitars and Adrian Smith adds the 3rd notes of the scales over the Dave Murray's line. This section repeats before a trill of rapid hammer-ons is substituted and finally the heavy powerchords of D5, G5 and E5 come in, with the twist of the G5 chord being inverted so the D is in the bass.
To play the first four bars, split the notes in to groups of four, and use the third finger for the higher fret and the first finger for the lower fret of each grouping. After the two bars first bar, make sure you skip the first note of every two bars and instead hold the final E and add a touch of fast vibrato.
For the fast trill section, simply hammer on and pull off rapidly. As with everything else, if you can't do it straight away play ti a little slower until you master it then speed up. The rhythm is particularly difficult but not entirely out of reach. Finally, the extra powerchord section that makes up the verse riff for the main guitar (There are three of them... 20 strings in total)
A Marshall amplifier is required (it's in the rule-book) with gain around 8. Iron Maiden use custom humbuckers so while any guitar with a bridge humbucker will sound fine, Dave Murray's custom Jackson is the weapon of choice to really make your stack growl.