@DKOC: Well there was this file in the folders that I ran:
2019.03.12_Shipping_Full_Build_5\WindowsNoEditor\Engine\Extras\Redist\en-us\UE4PrereqSetup_x64.exe
Is there something besides that .exe I need to run before I can use UE4? Not sure I've ever run a UE4 game on this machine tbh (aside from running this game months ago).
I'm honestly not sure if the UE4 redist contains all of the essential software you need.
Try updating Direct-X Runtime, Microsoft Visual C++ (vcredist), and your graphics driver if necessary.
Also, if the game's only exe isn't in the first folder you open, eg, before the data folders, you may have a corrupt download.
Should be:
Engine
WildLifeC
Manifest... .txt
WildLifeC.exe <This is what you run to launch the game
Lastly, I'd like to throw this out there, the new initial settings (for me at least) do not allow fullscreen play, it crashes immediately. You must open an older copy, and change the game to run in windowed mode, then exit. Launch the updated game, and then select your native screen resolution, but
do not change back to fullscreen.
Alternatively, navigate to this filepath:
C:\Users\(username)\AppData\Local\WilfLifeC\Saved\Config
Open WildLifeCSettings.ini, and edit this line:
Fullscreen=False