With both downloaded and installed, you’ll need the mod files. If no servers are showing, click the Filter button at the bottom of the screen and change max ping to 400 Where do I find the mods for ARMA 2?
At the bottom left of the screen, toggle through the Address choices until it says Address: Internet 8. Open up Arma 2 DayZ Mod to the splash screen and then exit 5. If you can afford it too, see also the Arma 3 Tac-Ops Mission Pack for a combat experience from multiple points of view. For a Singleplayer experience, the base campaign, Arma 3 Laws of War and in an other style Arma 3 Contact singleplayer campaigns are considered among the best singleplayer moments.
