Developer Wargaming has been steadily updating their MMO action game, World of Warships, ever since its release this past September.

The latest update to the game brings a crossover with the Arpeggio of Blue Steel -Ars Nova- series, which features both sentient warships and anime girls who control them. The key here is these ships and girls are the antagonists, which are fighting against humanity.

The new Arpeggio of Blue Steel update brings the custom Yokosuka Port, a new mode, the same warships from the Fleet of Fog seen in the series, and a dash of retro-Japanese sci-fi visuals and color. You’ll need to research a tech tree to tier six to begin this new sortie.

You can start playing World of Warships for free, here via the game’s official website.