Did you wake up bright and early on Christmas morning, rush downstairs, rip open your presents to find a brand new game for your Xbox or PlayStation? You were probably very disappointed when you popped it in and tried to log on to play online.
That's because hackers hit Sony and Microsoft - the makers of PlayStation and Xbox, respectively - with a massive DDoS attack. DDoS stands for Distributed Denial of Service. It basically means that Sony and Microsoft's online gaming networks - PlayStation Network and Xbox Live - were flooded with huge amounts of automated, artificial traffic.
It's as if hackers programmed millions and millions of little robots to all log on to the networks at the same time. The networks get bogged down and can't handle all that traffic, so the whole things crash and burn.
As of this morning, both PlayStation Network and Xbox Live are experiencing issues. Xbox Live is back up, but may have some slowness or lag. PlayStation Network is still officially listed as offline.