2 Answers
- Right click the (xonotic-0.8.2.zip) (0.8.2 is the latest version at date) with your mouse and choose (Extract here)
- Open the (Xonotic) folder.
- Start game by double click the purple (xonotic-linux64-sdl) icon. It might say windows instead of Linux and 32 instead of 64, depending on what OS you are using.