"adversary mode" refers to a situation or game where you are pitted against someone or something as your opponent or enemy. It's a term used to describe a competitive or confrontational setting or game mode. Full definition
In April, Rockstar will push out the Target Assault mode, and then on May 1st, players will be jumping into new new adversary modes, new vehicles, new transform races, and Doomsday Heist cars. (massivelyop.com)
The Halloween Surprise adds a spooky hearse and a monstrous hot rod to the vehicles available for purchase, new holiday - appropriate masks and makeup, and an eight - player Slasher adversary mode. (quartertothree.com)
Expect new aircrafts and cars, new competitive Adversary Modes, and some fun Halloween stuff. (wccftech.com)