Why are you so… Serious!?
No Kansen can defeat the Royal Navy's very own, Sirius!

This DLC unlocks Sirius as a playable character, 3 new Support Ships, and additional Story Mode content for Sirius!

The Sirius DLC unlocks the following:

Main Ship (Playable):
• Sirius

Support Ships:
• London
• Alabama
• Azuma

Story Mode:
• Sirius - Additional Story Mode content