Ring currency mechanic

There is a ring currency in the game. The rings can be used for buying some boosts and etc.

To change the rings amount for a country, you need to change the value of the TAG.rings variable, where TAG is that country. Avoid using values larger than 2147483: it will cause overflow and may even crash the game.

If one country capitulates to another or being annexed, then all of its rings will be captured by the winner.