DERP began the DDoS attacks with a few Tweets about League of Legends,
They then began cyber-terrorizing other sites, including Battle.net:
After which they began to speak with PhantomL0rd, a popular streamer on Twitch. He was playing a game of Dota 2 and they reached out to him to say if he lost the game they would take down Dota 2. He didn't win.
They also got bored at some point and took down EA's website.
Later in the day, DERP convinced PhantomL0rd to play Club Penguin, which turned out to be a mistake on his part:
PhantomL0rd, who streamed most of the series of events, asked DERP what their main objectives were. "For the lulz," they responded.
They also mentioned their dismay of money hungry companies. At the time of this writing, PhantomL0rd had to step away from his computer as he believed police officers were coming to his home.
No word yet from Riot Games, Blizzard, EA, or any of the assaulted sites.
As we hear more we'll be sure to update this story.