I recently noticed Unturned’s artistic style regarding flags, so I decided to go after all the national flags present in the game (curated + official) out of curiosity. Below are all the ones I found and their maps!
United States - Hawaii, Washington, California,“Arid”
California, USA - California
Canada - Yukon, PEI, Buak
Chile - Easter Island
Easter Island, Chile - Easter Island
Kuwait - Kuwait
Brazil - Rio de Janeiro
Germany - Germany
Russia - Russia
Belgium - Belgium
France - France
Ukraine - Carpat, Antarctica
Poland - Antarctica
Scotland - Antarctica
Ireland - Ireland
United Kingdon - Antarctica, Ireland
USSR - “Arid”
Coalition - Everywhere
So, these were all the national flags I found, but I probably missed something.