Overwatch, Blizzard's , was launched on May 24. Seven days later, in the early hours of May 31, Twitch streamer FenderellaKN became the first player to report hitting level 100.
As with many competitive online videogames, you're given a certain amount of points each game based on how well you perform. Each time you level up, you're given a reward, like a loot box or new emblem.
Unlike many other games though, reaching higher levels in Overwatch does not grant any new abilities or weapons. The reward here is purely aesthetic -- levelling up past 100 resets the player's level to 1, but you'll get a sweet, sweet star under your profile icon.
Earning that star is no walk in the park. It took FenderellaKN 92 hours, or roughly 13 hours a day over the course of the week, to hit the milestone.
If you're interested in the minutiae of the player's achievement, you can read his Reddit Ask Me Anything thread here.