Ubisoft announced that "Nightmare Fog," the new event in Tom Clancy's Rainbow Six Extraction, is now available until June 2. During this time-limited event, an unavoidable fog of toxins will cover the containment area and test all of the agents senses. This update will also introduce a deadly new enemy, the Vigil Proteen. Finally, thanks to the new prestige system, players will be able to earn additional XP.
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