You can earn NK coins by participating in activities on the Nitro Type platform, such as racing, completing achievements, or purchasing them with real money. NK coins can be used to purchase items in the game's store or upgrade your account.
Currently, the NK Coin system seems to be down, but when it's back up, NK Coins can be obtained at ninjakiwi and on the Wheel of Fate.
NK Novalja was created in 1993.
NK Opatija was created in 1911.
NK Karlovac was created in 1919.
NK Nosteria was created in 1921.
NK Zadar was created in 1949.
NK Nedelišće was created in 1946.
NK Vrbovec was created in 1924.
NK Rudeš was created in 1957.
NK Podravina was created in 1919.
NK Ponikve was created in 1945.
NK Neretva was created in 1919.