Bloodborne may be the best native PlayStation 4 exclusive to date, but following in the footsteps of a slew of broken games, it's launched with a nasty bug. The game-breaking glitch revolves around the Lunarium Key, which you're supposed to unlock after a specific boss fight. However, if you invite someone into your game while you're working through the Forbidden Woods area, you won't get it.
This makes it impossible to progress, which is, obviously, a pretty big problem. Fortunately, platform holder Sony has said that it's already aware of the issue and that it will fix it as part of a patch next week. This won't solve the long load times as well, but a fix for that is currently being investigated at developer From Software. Not ideal, then – but we've seen a lot, lot worse over the past six months.