Blue Whale Challenge
Blue Whale Challenge (Russian: Си́ний ки́т, romanized: Siniy kit), also known simply as the Blue Whale, is a social network phenomenon, first appeared in Russia in 2013, that is claimed to exist in several countries. It is a "game" reportedly consisting of a series of tasks assigned to players by administrators over a 50-day period, which are initially innocuous and then introduce elements of self-harm, with the final challenge requiring the player to kill themselves.