The images from the included game manual are picked up by Android's media scanner and show in the gallery app.
This is an easy fix. Include the file .nomedia in /sdcard/VendettaOnline/manual/images/ with the installer.

+ a lot

Hmm. That was supposedly fixed already.
There's supposed to be a .nomedia file in /sdcard/VendettaOnline/manual/images
Please check that it exists, thanks.

The file does not exist on my phone. Perhaps it only fixed it on new installations?

It didn't exist. I had to create one manually to make all these pictures get out of my gallery.

Ah hmm. Apparently our updater doesn't like zero-byte files.

It may be fixed in the next update.
However, Android usually only scans once unless you force it to scan for media again.