Virus Z is a top-down zombie shooter much like Left4Dead. You start on top of a building with your NCP companion. Pick a weapon on the table and some health, then start working your way through the city slaying zombies, hordes and mini bosses.
The demo includes a few linear maps and locations for you to traverse. If you survive and make it to the safe zone on the other side of the map, then you can continue to the next map.
I was able to launch and play Zombie Z without any serious issues. Wine 5.0 64-bit & DXVK handle the Unity 3D game well on my GeForce GTX 1060 in PlayOnLinux.
Mint 19.3 64-bit
GeForce GTX 1060
Wine 5.0 64-bit
DXVK 1.7 64-bit