HITLER: BDSM BUNKER [Final] [Romantic Room]

HITLER: BDSM BUNKER is third-person shooter where you have to kill zombies in the post-apocalyptic world.
you will meet a lot of bloodthirsty zombies who have only one thing on their mind – to kill you,
and you in turn have to kill them all.
Toward the end of the war, Adolf hid from the Allied army for a long time in a secret bunker with his assistant Christoph.
During their time in the hiding place, the two became truly close.
  But all things come to an end – many years have passed, it is time to come out.
Christoph leaves the bunker first to reconnoiter, but does not return.
Adolf decides to follow and finds that there are no people left around,
everything looks abandoned, and zombies roam the desolate streets.
The Führer goes in search of Christoph, hoping that he is still alive.
Along the way, the protagonist finds notes from his subordinate along with 18+ photos.
So Christoph is still alive and needs to be found.