The spoiler alert achievement pays homage to RWBY Volume 4 in which
*** Spoiler - click to reveal *** both teams RWBY and JNPR fragmented after the events of Volume 3 ( Weiss = Taken home, Blake = going AWOL, Yang = Injury, Pyrrha = Death) and the creation of the new team RNJR. (Ranger)
All you have to do is play an online game where all players must form this group Ren, Nora, Jaune and Ruby. (
NOTE you all must fill this team form, you can't obtain this achievement by having multiples of the same character)