As the title states we know of the Cabal, The Fallen, The Hive and Vex but who is the 5th Race? I am not including Humanity and the subcategories such as the awoken and exo. The only thing i have found is the Onyx Pyramids here ( http://i.imgur.com/HK08XzY.jpg ) even then they are not the ships any of the other races use. The photo of the races has 5 there and the 5th has smoke and Pyramids and we see these Pyramids in a huge cluster in the other photo. There is even achievement called Dragon slayer: Kill a champion of the Dark. We know there is a dragon seen in the trailers. Read this, It's Rasputin the AI that protected earth at the collapse and his encounter with the darkness. [spoiler]-----Ghost Fragment: Darkness----- V113NNI070XMX001 SECRET HADAL INSTANT AI-COM/RSPN: SOLSECCENT//SxISR//DEEPSPACE CONTACT CONTACT CONTACT TRANSIENT. NULLSOURCE. NULLTYPE. This is a SKYSHOCK ALERT. Multiple distributed ISR assets report a TRANSIENT NEAR EXTRASOLAR EVENT. Event duration ZERO POINT THREE SECONDS. Event footprint includes sterile neutrino scattering and gravity waves. Omnibus analysis detects deep structure information content (nine sigma) and internal teleonomy. No hypothesis on event mechanism (FLAG ACAUSAL). Bootstrap simulation suggests event is DIRECTED and INIMICABLE (convergent q-Bayes/Monte Carlo probability approaches 1). No hypothesis on deep structure encoding (TCC/NP-HARD). Source blueshift suggests IMMINENT SOLAR ENTRY. Promote event to SKYSHOCK: OCP: EXTINCTION. Activate VOLUSPA. Activate YUGA. Cauterize public sources to SECURE ISIS and harden for defensive action. I am invoking CARRHAE WHITE and assuming control of solar defenses. STOP STOP STOP V113NNI070XMX091[/spoiler] Any ideas or clues? Could the 5th race be the darkness? Edit: we only know that The Darkness is a very old enemy of the Traveler. Notice the Triangle ships in the first photo and the similarity with the second photo.