A giant Dota 2 tournament wrapping up tonight in Boston just reached a dramatic peak after favorites OG fell to underdogs AD Finem in a stunning game three that went into the 80th minute.

The match ended when one of AD Finem’s players managed to sneak into the enemy base undetected using an invisibility buff to finally break OG’s base after a game they looked destined to win.

The series now sits at 2-1 still in favor of OG with the first place share of a $3,000,000 prize pool on the line. Now matter who eventually takes the grand finals at this Major, AD Finem, a team who has never competed at the top levels of competitive Dota 2 before, will have made history. You can watch the final match(es) below: