User blog comment:Deathstalker666/The Sound of Shotguns/@comment-1496755-20170308215935

Some of the new batch of classical tunes are familiar - I'm pretty sure I've heard the E2M7 and Victory ("The Moonlight Sonata") pieces in E12N.

I've heard a longer version of E1M3 too... but in a Doom 2 megaWAD, which is a bit problematic since you are a Doom 2 atheist :P