Good to see old Shep back in action. Liking the first (well overdue) single player DLC. More of this and less bloody multiplayer map packs. Curious mix between sleuthing and killing. Some very tense action parts and an intriguing mystery to follow with a good conclusion explaining some (but not all...) of the Reaper's origins. Didn't say why the Catalyst suddenly thought of the Leviathans as a threat to organics...all they wanted to do was protect organics.