If you try and connect to The Dead Return or a number of other “Vanilla” DayZ Mod servers and you get “session lost”, then try these:
- Make sure you are running Steam as Administrator
- Make sure you downloaded Arma2: DayZ Mod via the Steam store (it is free). It’s the same as the one from DayZ Launcher, but Steam is looking in the Steam library for it.
- If you are using DayZ Launcher, make sure you have version 0.1.3.4 or higher and check “Launch DayZMod as Steam App” under Settings. Click “Update Launcher” if necessary.
- If you are running a custom .BAT file, then take a look at this post.