/int/ as the name implies originates from international boards of various forums and chans, the basic idea behind it is nationplay and politics. It is however optional whether players wish to participate in roleplay and the rulebook is clearly defined and enforced.
A mature server with a player base consisting of mostly adults it has been running since 2011, it has an extensive Wiki, Teamspeak, and IRC. The server runs Vanilla MC however the following plugins are installed: AuthMe, Cenotaph, CountryLoginMessage, EasyBan, GeoIPTools, HomeSpawnPlug, LogBlock, LWC, Shopkeeper, WorldBorder, and factions.