since you guys finally got around to making an entry for OurMine, now is a perfect time to make one for Poodlecorp. Poodlecorp is even more well known than OurMine and have been known for not just hacks but also DDOS attacks on video game servers.
They're most well known for taking down the Pokemon GO servers
http://www.independent.co.uk/life-style/gadgets-and-tech/gaming/pokemon-go-down-servers-ddos-attack-hackers-poodlecorp-game-unavailable-a7140811.html
Some of the more high profile hacks they did include WatchMojo, LeafyIsHere, RedMercy, and Superwoman
https://www.hackread.com/leafyishere-youtube-channel-hacked/
http://www.wetheunicorns.com/news/leafyishere-leafy-hacked-poodle-corp-channel/#ql6ePWy1rRE4EVYI.97
https://www.hackread.com/watchmojo-redmercy-youtube-hacked/
But the best of their acts was when they DDOS'd the Battlefield 1 servers, they only brought it back up after forcing Keemstar to say live on DramaAlert that Leafy is the greatest YouTuber of all time