1. Added mechanics for the scientific level of the region and the state. Now the quality of education in the region is important for scientific progress.
2. Added construction technologies until 2090, and rebalanced other technologies.
3. Added the ability to enter into a scientific partnership with another state.
4. Rebalanced some economic parameters. The state's income will increase.
5. Added the ability to build enterprises in other countries.
6. Fixed the logic of concluding peace. The player now decides when to start negotiations. AI in a war against AI annexes the loser.