This isn't about hacking Steam or Riot Games directly. Instead, hackers take credentials from older, unrelated data breaches (like a fitness app or a forum) and "stuff" them into gaming login portals. Because users frequently reuse passwords, a breach at a pizza shop can lead to a hijacked Valorant account.
A "combo" (short for combination list) is a text file containing pairs of usernames/emails and passwords. When someone advertises they are claiming to have 762,000 "Ultra High Quality" credentials. But where do they come from? 762k UHQ User-Pass Gaming Combo(Steam,Valorante...
Gaming accounts are high-value targets. A Steam account with rare CS:GO skins or a Valorant account with "unranked" status but high-tier skins can be flipped for hundreds of dollars on gray-market sites. The "Checker" Economy This isn't about hacking Steam or Riot Games directly