I love this world war themed, mixed with magical creature and zombie.
You can replay each chapter to find miss places and things. In addition, there are (time trial) challenges with weapon rewards for your story progression. Not sure if help much, weapons look easy to find though but challenges are fun.

Gameplay is nice, but disappointed by performance
Not always but often got some bugs.

Loading bug,
sometimes the game started while facing loading screen and loading won't be ended after 15 mins waiting. It seems loading was ended but screen still there. Keyboard-mouse input and weapons-zombies sounds are working.

Screen bug,
got this only one time. This bug like loading bug as described but using last frame I see instead of loading screen.

ALT+Tab bug while playing,
sometimes can, sometimes allow first attempt but won't let you in-game (not responding, or not shown in taskbar), and often disabled.

--------------

Proc: Intel Core i3-6006U 2.0 GHz
VGA: NVIDIA GeForce 940MX 2 GB
RAM: 12 GB
OS: Windows 10 Education x64

Preset: Standard
Resolution: 1080p (Fullscreen)