There are seven countries in Papers, Please. Cobrastan is a made-up country name, written in the crude fake passport originally presented by Jorji Costava. The game takes place in the border town of East Grestin (marked by a crosshair on the map) in communist Arstotzka. The countries of Antegria and Republia also appear in The Republia Times, another game by Lucas Pope set in the same universe.
The countries are, in alphabetical order: