The company announced on Twitter that it had been affected by hacker attacks. You can read here what exactly was stolen.
Multiple Attacks
In the last few days, Riot Games has been the victim of multiple hacker attacks. An investigation has already been initiated. Riot Games has also confirmed that no personal data of players was stolen in the attack. However, they could only make further statements when the investigation is completed.
The effects of the attack are already clear - that some game updates will be delayed. Which games are affected, the tweet did not tell us. But we expect new information in a few days. By then, the investigation should also be completed. As a precaution, however, players should change all their passwords, especially those associated with Riot Games.