Music taken from Hakitas Bandcamp page, "Heaven Pierce her" https://heavenpierceher.bandcamp.com/album/ultrakill-violence
This was simply made for fun, go buy the ost from the official page.
Timestamps (Credits to @bonealted)
0:10 The World Looks White
2:35 The World Looks Red
9:15 Bull of Hell
12:53 "Do Robots Dream of Eternal Sleep?"
15:03 Hear! The Siren Song Call of Death
20:22 Suffering Leaves Suffering Leaves
22:39 Danse Macabre
26:13 War Without Reason