This is the decryption in the Call of Duty mobile game. The first level is to spell words with letters on the wall, and the last word is nightmare, so the letter to be filled in is: ihta. It is suggested that the picture on the wall is related to numbers, and the problem with the picture is the time when the midnight bell rings.

Game content:

In this round of "Call of Duty" mobile game test, players will give priority to more than a dozen different types and styles of gameplay modes. In addition to the five classic modes of conventional cognition: charge team competition, tactical team competition, stronghold competition, classic blasting and individual competition.

It also includes: ambush on all sides, flag-grabbing battle, killing two heroes, undead attack, card-grabbing action, soldier-king group battle, unlimited firepower, sword shadow and so on.