Over 9 million keys used to active video games on the massively popular Steam platform were stolen last month, ZDNet reports.
The hack targeted DLH.net, a gaming community site, which used a known vulnerability that allowed the attacker to gain access to its system. The alleged hacker stole credentials for 1.9 million Dota 2 accounts as well.
You can check if your data was stolen at LeakedSource.com, which has the full stolen database available for search.
You can read the full report at ZDNet.