Increased maximum creep size from 30 to 50 body parts.
Roads now can be built in rooms with any Controller Level, and even without controller.
The maximum number of construction sites per player is 100.
Increased available extensions number on RCL 7 from 50 to 80.
Increased the amount of WORK body parts required for Creep.reserveController method from 24 to 40.
API changes
Added new constants FIND_MY_CONSTRUCTION_SITES, FIND_HOSTILE_CONSTRUCTION_SITES.
Each API method that changes the game object state (like move, transferEnergy, createCreep etc.) consumes constant CPU amount rather than zero usage before. Learn more in this article.
Introduced new structure: Storage. It is available at RCL 4 and allows to store up to 500K energy units.
Roads now decay for 100 hits per 1000 ticks at plain land and for 500 hits per 1000 ticks at swamp. Every creep step decreases the timer for 1 tick per each creep body part.
Increased ramparts decay from 1 hit/30 ticks to 300 hits/100 ticks.
Increased HEAL body part cost from 200 to 250.
API changes
Breaking change: renamed Creep.energy property to Creep.carry.energy. Old name is still available, but is considered deprecated and will be removed soon.
Breaking change: renamed Creep.energyCapacity property to Creep.carryCapacity. Old name is still available, but is considered deprecated and will be removed soon.
Global Control Level requirements decreased 3 times. It is a temporary measure during the Early Preview. After the release it will be increased to the initial value again.