The court in the city of Yekaterinburg found Ruslan Sokolovsky guilty of insulting religious believers and inciting hatred.
During the trial, Sokolovsky, now aged 22, had pleaded not guilty.
He filmed himself playing the popular game in the local Orthodox church in August 2016.
He was arrested shortly afterwards.
On Thursday, Sokolovsky was also found guilty of "illegal trafficking of special technical equipment" after a pen with a built-in video camera had been discovered during the search of his home.