Have to say this Gurren Lagann OST Vol.2 (AKA SOUL EATER OST1) announcement flew under my radar completely (stopped watching/caring around episode 7) - better a late mention than no mention, I guess? August 27, 2008 release.

「 ソウルイーター 」 オリジナルサウンドトラック 1
SOUL EATER Original Soundtrack 1
 

Taku Iwasaki
2008.08.27 : SVWC-7569

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20. 		DEATHCITY (4:33)
soul-eater (so scandalous) (3:29)
PSYCHEDELIC SOULJAM (4:06)
4242564 (3:18)
malleus maleficarum (2:41)
victor (3:46)
lady of gorgon (4:04)
mifune (4:21)
BLACK☆STAR(never lose myself) (3:39)
harmoNIZE (3:06)
masamune (3:32)
camellia (3:35)
krieg (3:20)
kampf (2:36)
lycaon (3:30)
soulmates (2:54)
selenic soul (2:15)
blitz (2:29)
Death The Kid (so crazy) (3:38)
Bang! Bang! Bang! Bang! Have a Nice Dream (3:58)