Combat Mechanics

Ammunition
On maps with overworld segments, your fleet will have an ammunition limited indicated on the top of the screen.



Each enemy encounter consumes 20% of your ammunition, with fleet damage reduced by 50% at 0% ammunition. On maps with 6 or more enemy fleets, there will usually be a supply pickup somewhere on the map, which will replenish 30% of your ammunition reserves. This effect can be increased by ships with special skills, like Tenryuu.

Combat Grade
The game grades your combat performance from F to SS depending on how well you perform. As of April 27, 2020, grading criteria for all maps are the same. Requirements are cumulative in that all conditions below a grade have to be fulfilled to achieve said grade. Note that lettered maps (1-A, 2-H, etc.) only go up to S.

SS: Clear the map with two or less ships at heavy damage (red health)

S: Clear the map with 20 seconds or more remaining

A: Clear the map without losing any ships

B: Sink the enemy fleet

F: Fail to sink the enemy fleet



Danger Level/Battle Skip
Maps that have an overworld mode have a danger level that changes the more times you clear the map. The more times you clear the map, the "safer" it becomes and enables the ability to skip non-boss battles if certain conditions are met (running into the enemy automatically nets your fleet a victory without consuming ammunition). A special cut-in will play upon skipping a battle. At player level 60, the danger level for a map can be manually selected up to the level currently unlocked.



Note: Danger level automatically decreases to 1 when completing a map with a 3★ rating

Fleet Conditions
Each world (1-1, 2-1, 3-1, 4-1, E1, etc.) has its own condition to enable battle skips. Each SR/SSR ship in your fleet that meets this condition will enable a single battle skip, up to the number dictated by your current danger level. For example, if 4-2 is at danger level 2 and there are 3 BC/BB in the fleet, only 3 battle skips will be enabled. Similarly, if the fleet has 6 BC/BB, it will only skip 4 battles.

Stars


Regular quests have 3 achievable stars that give various rewards when a certain number of stars have been achieved for the world (10/20/30 stars for lettered quests and 3/6/9/12 stars for numbered quests). Star conditions are divided into two types: those for numbered quests and those for lettered quests. Stars can be obtained separately across multiple runs.

Lettered quest (1-A, 1-B, etc.) stars:

Sink all enemies

Clear with at least 10% time remaining (18s or more for most quests)

Clear with at least 25% time remaining (45s or more for most quests)

Numbered quest (1-1, 1-2, etc.) stars:

Sink the enemy main fleet with a grade of A or above

Engage with every enemy in the quest and clear with SS grade

(World 1 only) Clear within the allotted time

(Worlds past 1) Clear with 25% time remaining