So on just about every Bolt Thrower album there is a song that follows a certain template. This began with the song World Eater on Realm of Chaos. Its mostly the intro/outro riff which is a chug chug skull crushing monster that after the intro leads into the song proper. At the end of the song (most anyways) the band breaks from the song back into that riff and play it while the song fades out.
I thought it would be cool to put all the songs in chronological order so here we go!
World Eater - Realm of Chaos - 1989
Cenotaph - War Master - 1991
Embers - The IVth Crusade - 1992
Powder Burns - Mercenary - 1998
The Killchain - Those Once Loyal - 2005
There you have it!