The man behind the suicide game - Blue Whale Challenge - targeting children has declared he thinks of his victims as "biological waste".
He told police that they were "happy to die" and he was "cleansing society".
According to the UK's Daily Mail, Philipp Budeikin has been inundated with love letters from teenage girls addressed to him at a Russian jail where he is in custody.
Budeikin is being held on charges of inciting at least 16 schoolgirls to kill themselves by taking part in his social media craze, which police fear has spread to Kenya.
The 21-year-old Russian, who has now confessed to the crimes, says he thinks of his victims as "biological waste" and told police that they were "happy to die" and he was "cleansing society", the Daily Mail reports.
The game involves brainwashing vulnerable teenagers over a period of 50 days, urging them to complete tasks from watching horror movies to waking at strange hours, and self-harming.
Eventually exhausted and confused, they are told to commit suicide, and it is feared in Russia that dozens have done so at the bidding of Budeikin or other "mentors".
The paper cited Russian prison authorities saying they had received dozens of love letters from teenage girls for the suspect at notorious Kresty jail in St Petersburg.
The Kenya Film Classification Board (KFCB) announced it had banned the online video game.
"The board has ordered an immediate withdrawal of the game from all social media sites in Kenya and asked all Internet Service Providers in Kenya to ensure it is not available in Kenya," said KFCB CEO Ezekiel Mutua.
This came hot on the heels of a suicide incident involving a 16-year old boy in Kiambu County.
The Form 2 student at JG Kiereini Secondary School, had allegedly played this game that encourages a player to commit suicide to show that one is a hero.