Image credit: Eurogamer PlayStation users have discovered an issue whereby some digital games become unplayable unless an online connection is made every 30 days - although further community digging suggests it seems to be only a one-off, temporary form of digital rights management (commonly known as DRM). The 30-day countdown appears to have been first discovered on 25 April by YouTuber Modded Warfare , who noticed its presence next to newly bought PlayStation 4 games. The initial suspicion was that this was a new form of DRM suddenly added by Sony, which required an internet connection at least once every 30 days for purchased games to be playable. Here are some PlayStation 5 games coming out soon. Watch on YouTube This was the suspicion because, as discovered by subsequent testers of this new validity countdown such as Spawn Wave on YouTube , if it reached zero before an internet connection was established, access to purchased games was locked off.…