$2 billion bug
The $2 billion bug is a problem first encountered in Earth: 2025 where the maximum amount of money or food a country could have was $2 billion. This originated due to a common programming problem, where data is stored as a signed 32-bit integer, giving it a range from 2^31 to -2^31, or about +/- 2.1B; to preserve the conditions this bug had created, the 2B bug was initially coded into Earth Empires, with a hard limit of 2*10^9 on money, food, and oil. This bug is no longer in effect on any servers, having been phased out of the game as servers reset, instead being replaced by a 0.1% corruption rate per turn on any cash beyond $2 billion, an identical rate to that of food decay.
Removal of this bug most notably affects gameplay in allowing players to sell larger portions of military and food on the public market without the possibility of losing any money that would have had on hand above $2 billion.