We strongly recommend that you buy the game so you can support the developershttps://store.steampowered.com/app/221100/DayZ/
WHAT IS DAYZ
HOW DO I INSTALL DAYZ?
1. Click the green UploadHub button and you should be redirected to the Download.
2. Once DAYZ is finished downloading, extract the .rar file. (You will need WinRar, you can get it here
3. Once its extracted, go into the games folder and right click the game and run it as administrator and Enjoy!