Dificultatea Apocalyptic n-ar trebui sa fie o problema. In schimb Nightmare mode suna intr-adevar de cosmar:

Nightmare Mode, a brand new difficulty setting that truly lives up to its name. You have the option of selecting it from the beginning of the game, and having it on means that once you die, it’s a permanent game over. No checkpoints, respawns, or anything like that.