In your opinion, which were the hardest missions of each type upon release and/or at level? I've been playing since early 2012, for reference. I haven't played any of these at level in a REALLY long time, so bear with me. I have not idea how hard these are now. Mine would be: Level Up - Bruno Mannheim's dungeon back in the early level 20's was pretty brutal back in the days. I had to get a piece of T1 in order to finally beat it by myself. Single Player Challenge - Everything from T1-T5 was pretty boring. If I had to choose, i guess it would be Circe's Stronghold (Wonder Woman/Circe mentor mission). Duo - OMAC base was pretty bad, but do-able. I remember it taking me awhile for me to beat Flashback as well. Cape Carmine Lighthouse is up there as well. Spark of Ion is terrible with a bad partner Alert - Oolong Island T2 and HIVE Base T2 were absolutely unforgiving at release I absolutely hate running Demon's Plan. Everything can go well until you allow for a small mistake in the boss fights. Fatal Exams is brutal with PUGs. I can comfortably say that I will never do Fatal Exams again. Raid - FOS 2. There's no contest. Though I actually liked running it. Those Marks of Krypton felt well earned. Sometimes, I wish I could go back to struggling along with the team to get past that dang bridge, lol. Ones that I hated and considered extremely hard are Inner Sanctum and Paradox Wave. Seasonal - This one may come off as stupid, but I could never beat Larfleeze's Christmas special or whatever back in 2012. I waited a whole year until I actually started getting feats for the holiday. Which are yours?