[Cabin Construction]
Unlock Requirement: Clear Normal 4-5
Build and upgrade cabins to unlock skills that provide combat and construction bonuses.

[Tech]
Unlock the Tech feature to research techs in the Battle and Economy branches, gaining various helpful bonuses.

[Intel Center]
In the Intel Center, you can reroll to obtain various affixes that provide powerful combat bonuses.

[Captive Quarters]
Capture other players' Battleships by defeating them. You will receive up to 10% of your captives' idle rewards based on their progress.
Idle rewards can only be accumulated for up to 8 hours.