Carrion (Corpse) - The Binding of Isaac: Repentance OST

TBOI OST - 52 - Walls Of Denial (Mausoleum)

Portal 2 - Turret Redemption Line

Ascension (Chest Fight)

Empty Vessels (Angel Room)

All credits go to Kyle Gabler and Jonny Trengrove as well as all the other musicians:

Community musicians:
Adam Lasnik
Adrian Cârciova aka Tony Baboon
Alex (Rotta Lopaatkinen) Balmos
Andy "ahndrew" Whelan
邹上豪(Apermesa)
Avery J. Franklin
Brendan Simkins
Callum McCubbin
Carlos Arrieta "dreampillet"
Cole Wachal
Courtney Swain
Daniel Aidan Corbridge
Daniil Kudryashev Ardni K
Danil Khakimov (Postpunked)
Darío "Broosk" Oyarzo García
David Gravagno (Shady Monk)
Descenacre (Canana)
Do Noise
Douglas Inglis
Emily Simkins
GRAVITEKA (Andrey Zamaraev)
Guy Bianco IV
Harrison Girault Jones
Infinite Cloudscapes
J. E.
Haha Gibson
Jerod Collins - The8BitDrummer
Jimmy North
Jonathan Larson
Josiah Dirkse
Juan Fangio
Kae
Kamil Maliński
Kat Pyrope
Kuba "Bebok" Górny
老饕_LaoTao
Lauren Riley
Maarten Vanooteghem
Matt Vollrath
Maxwell Klein (Credit)
Maxwell Rodley
Merge Left
Mia Stapley
Nibroc_64
Philipp "MrGermanpiano" Heinrich
Phillip Moss
PinpinNeon
Samuel Dorrego Fernández (Aviarium)
Shimmy Levy
Theo Róseo
Thomas Gourlay
Toby Kozlowski
Tom Rijndorp
Victoria Rose Hansen

Some others who are family or friends:
Jordan Price
Aleš Mlakar
Mary-Anne "Zoe" Wallace
Mel Lam
Portia D.
Kyle Gray
Kyle Gabler
Jonny Trengrove
Dandy Wheeler

Atomic Express - World of Goo 2

Autumn

Original soundtrack from the indie game World of Goo.
http://kylegabler.com/WorldOfGooSoundtrack/ for more info.

12. Burning Man

13. Cog in the Machine

17. Years of Work

18. My Virtual World of Goo Corporation