S1mple
Oleksandr Olegovich Kostyliev (Ukrainian) or Aleksandr Olegovich Kostilev (Russian) (, Russian: Александр Олегович Костылев); born 2 October 1997), better known as s1mple  or Sasha, is a Ukrainian professional Counter-Strike: Global Offensive player for Natus Vincere.  He is one of the best players in Global Offensive history.