A post on the RuneScape Forum from Jagex says they "are aware that RuneScape (as well as other games) are being targeted by attacks," saying the connectivity issues are also impacting their web services and Old School RuneScape. Also, CCP Tweets that EVE Online has suffered two recent DDoS attacks, though they follow-up saying service was restored, and apparently their current downtime is for extended maintenance. According to Develop it is "suggested" that League of Legends and Guild Wars 2 have also suffered recent attacks, but they don't say who has suggested this, though this reddit thread backs this up.