Since the trophies were released for Wolfenstein 2 The New Colossus, it has been clear that there is a difficulty called “Mein Leben“. There have been rumors and speculation what this difficulty entails.
I can confirm that it is indeed a 1 life permadeath mode WITHOUT checkpoints or manual saves. You must complete it in ONE SITTING without leaving the game. If you die, you have to restart the game from the beginning!!! It is based on “I am death incarnate!” difficulty.
Mein leben difficulty is unlocked after beating the game for the first time (on any difficulty, the lowest difficulty does suffice).
Unfortunately, it cannot be cheated by replaying just the last chapter. This difficulty can’t even be selected in the pause menu (it only goes up to “I am death incarnate!”). The only way to select it is by starting a New Game.
There are no checkpoints so you cannot back up your save game either. It has to be done in ONE SITTING without leaving the game. Die once and you must replay everything from the start.
Wolfenstein 2 The New Colossus is possibly the hardest game in the series. There are lots of heavy-armored enemies and at certain sections you get swarmed by enemies from all sides. This is going to be extremely challenging. The game isn’t short either, it takes around 10 hours. Furthermore, many of the cutscenes are unskippable. You have to rewatch them on each attempt of Mein Leben.
It’s highly recommended that you do a few test runs on “I am death incarnate!” first to get a feel for enemy spawns, ammo conservation and remember where to find health items.
Most ridiculous of all, beating Mein leben is only worth a bronze trophy.