Steam's Summer Sale kicked off on Thursday amidst a "test" denial of service attack by CyberTeam. Two products that have received discounts are the Steam Controller (70% off) and Steam Link (30% off).
Steam summer sale 2017 RSS
Some users are unable to properly access Steam servers during the the 2017 Summer Sale. Hacker group CyberTeam claimed responsibility and promised a full attack targeting all servers is on the way.