Just over a month after the release of Diablo III, Kripparrian, a pro player, has managed to complete the game on its hardest setting.

Toronto-based Kripparrian posted a video on YouTube showing the hard fight against Diablo – the ultimate boss in the game.

To make the task harder, Kripparrian used the game’s “hard core” setting which left little room for error.

The achievement has been confirmed by the game’s developer, Blizzard.

The hugely popular Diablo III game casts players in the role of a hero who has to save the mythical world of Sanctuary from a demonic invasion.

Kripparrian made this job as hard as possible by playing the game’s Inferno mode which makes in-game enemies much tougher.

In addition, he used a “hard core” character. This meant that, if the character died once, the game would be over. He also got in-game help from another player called Krippi.

Just over a month after the release of Diablo III, Kripparrian, a pro player, has managed to complete the game on its hardest setting

The final fight against Diablo, the ultimate boss in the game, took about 25 minutes and Kripparrian was jubilant once it was done.

The achievement was completed prior to the application of the latest patch for the game which makes monsters easier to kill.

“With this patch, the bosses, the mobs, they become easier,” he said in the video of the kill.

“We didn’t want to beat it that way. We wanted to beat the game when it was hard, at the hardest point possible. So it was a race against time.”

One of Blizzard’s community managers confirmed the achievement soon after and offered congratulations via Twitter.

 [youtube y-DjYYZitRU]