On the following page of our Devil May Cry 5 Guide, you will find a description of the first secret mission in the game.
Secret mission 01
Where to find it: Mission 02 - Qlipoth
The first secret mission in the game is not hidden and every player will find it in the form of a tutorial. Passing through another room in the hotel you will come across a pentagram in the room. Stand in the right place for the signs to unite and you'll launch your first secret mission.
The aim of this secret mission is to eliminate all demons in 90 seconds. Your enemies are Empusa and Hell Caina. Enemies are not too strong, so you should calmly cope. Try to use the potential of your metal prosthesis to perform strong area attacks.
When you have completed the challenge, you will get a fragment of the blue sphere and you will be able to continue the mission.