Johan Sundstein, better known as N0tail, is a Danish-Faroese professional Dota 2 player for OG. As a member of OG, he has played in four iterations of The International, winning in 2018 and 2019, and has also won four Major championships.

OG is a professional esports organisation based in Europe. Formed in 2015, they are best known for their Dota 2 team who won The International 2018 and 2019 tournaments. They also have a Counter-Strike 2 and a Rocket League team.