There are many tracks that appear in the game but are considered to be "unofficial." It is unknown why this is the case, because they were created for the game - for example, in the Blue Lagoon or Ethan's duplex, or even the "For Love" trailer.
Unofficial
Beat Street - Tim Garland
Euphoric Ascension - Matt Hill
Dubwah - Terry Devine-King
Broadcast News - Paul Mottram
Infiltration - Barrie Gledden, Ed Collins
One More Time - Barrie Gledden, Peter Shand
Poker Face - Matt Hill
Driller Thriller - Matt Hill
Underground - Gareth Johnson
Come Closer - Barrie Gledden, Richard Lacy, Sulene Fleming, Richard Kimmings
Bumpkin Pie - Barrie Gledden, Richard Kimmings
Headless Horseman - Oliver Ledbury
Be in the Groove - Igor Dvorkin, Duncan Pittock
Funkin Bhangra - David O'Brien, Kevin Browne, Johnny Lithium
Mental Fundamental - David O'Brien, Johnny Lithium
Blade - Bob Bradley
The Hoards Descend - Debbie Wiseman
Tune Army - Barrie Gledden
Chemical Imbalance - Barrie Gledden, Steve Dymond, Jason Pedder
Easy Now - Barrie Gledden, Tim Rolly, Jason Pedder
Just Getting By - Gareth Johnson
Wow - Gareth Johnson
Suburban Cowboy - Darren Leigh Purkiss
Over & Over - Bob Bradley, Sarah Wassal
Biggest Fan - Igor Dvorkin, Sulene Fleming, Duncan Pittock, Ellie Kidd
Mars - Terry Devine-King
Nerves - Gareth Johnson
Roadhouse - Gareth Johnson
Slow - Barrie Gledden, Sulene Fleming, Richard Kimmings
Take Off - Gareth Johnson
Dissolve the Sun - Gareth Johnson
One More Night - Gareth Johnson
Got the Cream - Gareth Johnson, Kevin Browne
Robotic Neurotic - Tom Quick
Jealous Minds - Tim Devine, Peter Masitti
Out of Control - Barrie Gledden, Jason Pedder, Steve Dymond, Sulene Fleming
Are You Ready - Barrie Gledden, Steve Dymond, Jason Pedder
A Feeling of Power - Barrie Gledden, Steve Dymond, Jason Pedder
Breathe Easy - Igor Dvorkin, Dean Bayley, Adrian Francis, Francesca Belmonte
It's Too Late Now - Igor Dvorkin, Sulene Fleming, Duncan Pittock
Shatter - Bob Bradley, Nick McEnally
Evolution - Bob Bradley, Paul Mottram
Falling Backwards - Nick Kershaw
Binary Funk - David O'Brien
Peaks - Bob Bradley
From this list, some songs were played in the following chapters: