Peta edicija Lost Theory festivala održat će se od 12. – 17. kolovoza 2015., u Deringaju kod Gračaca, a ulaznice se mogu nabaviti putem web stranice festivala.Vrijeme održavanja festivala se ponovno odvija u kolovozu na ekološkom imanju pokraj rijeke Otuče. Na četiri pozornice svoju glazbu izvodit će preko 100 izvođača koji su sljedeći:
MAIN STAGE
Abyss Ooze / Atriohm vs Encephalopaticys / Already Maged / Anoebis / Ankur / Cosmo / Cosmic Dimension / Crossing Mind (retro set) / Derango / Etnica (retro set) / Farebi Jalebi / Fractal Gauchos / Frantic Noise / Flooting Grooves / Gaspard / Gojja / Hashbury / Highko / Hutti Heitta / Hypogeo / Imba / Justin Chaos / Kashyyyk / Kindzadza / Kraft / Logic Bomb / Loud / Lugus / Master Margherita / Megalopsy / Merkaba / Naty Seres / Pandora’s Box / Petran / Prana (retro set) / Procs / Quantum Mechanica / Ryanosaurus / Sensient / Shakta (retro set) / Sonic Species / Stevo / Sunshine / Terrafractyl / Tetrameth / Texas Faggott / The Infinity Project (retro set)/ Val Vashar / Vibrasphere by Robert / Whrikk / X-Dream (retro set) by Marcus
SECRET CHAMBER
Hosted by Groove Secret Chamber Atroop / Avi Lovey / Bayawaka / Billain / Broken Note / Bufo Retro set / D-Wauw / Darkul Trinity / Electrocado / Evil Oil Man / Fabio Leal / Fako / Florian MSK / Grub / Guy Zappa / Hypnagog / Jekyll / Kalya Scintilla / Kasadelica / Kromagon / Kryptamine / Lehman / Mad Zach / Mantismash / Mara / Master Margherita / Master Minded / Messy Mass / Muggy Dane / Mumukshu / Na-Ti / Nangijala / Okapi / Onionbrain / Otkun / Prisma / R.O / Random Gang Sign / Sensient Techno SET / Tijah / Tribone / Whitebear
AMBIENT GARDEN
Akasha / Anoebis / Bayawaka / Bwoy De Bhajan / Avi Lovey / Flooting grooves / Guy Zappa / Johnny Blue / Khalil / Master Margarita / Marco Mental / Meribel / Merkbar / Mumukshu / Pila / Pipal / Prisma (Megalopsy) / Quanta / Raviv / Skogsdrom / Stellar Ink Pony / Tengri / Val vashar / Whitebear / Witch Princess
DUB FOREST
Hosted by Digitron Sound System – Balkan Dub Defenders