DreamHack Open Cluj-Napoca 2015 was the seventh Counter-Strike: Global Offensive Major Championship that was held from October 28 – November 1, 2015 at the Sala Polivalentă in Cluj-Napoca, Romania.

It was organized by DreamHack with help from Valve and the Professional Gamers League.

Fnatic, G2 Esports, Luminosity Gaming, Natus Vincere, Ninjas in Pyjamas, Team EnVyUs, Team SoloMid, and Virtus.pro – all Legends from the last major – were once again Legends as no Challenger took their spots.

[1][2] The top eight teams from ESL One Cologne 2015 ("Legends") received direct invitations to Cluj-Napoca.

The top eight teams from DreamHack Open Stockholm 2015 then advanced to the Major as the "Challengers" Teams were split up into four groups, and all group matches were best-of-ones with the exception of the final decider match.

In all best-of-three series, each team first banned a map, leaving a five-map pool.

The 16 teams at the major qualifier played at DreamHack Open Stockholm 2015.

The main qualifier took place at DreamHack Open Stockholm 2015.