The sub has been updated and rebalanced. Details are in the Change Note!

This is more or less a meme build tho, lol.

Great job thanks!

"Embrace the Abyss" update introduced new Charybdis and Endworm capable of breaching alien wall construction, thus stripping this sub's invincibility. Fortunately, double hull construction is able to prevent the sub from getting one-shoted. The crews still have hope in bringing down the abyssal creatures.

Got help from 5 charybdis(es) to test the submarine's armor.

While the alien walls did their job flawlessly, my crews were literally got shaken around inside the sub like pebbles in a gourd, haha...

The fight ended with tiny leak in the docking port without any flooding.
However, all crews suffered from countless bone fracture (that must be really hurt).
I guess invincibility is possible for the sub, but not for the people inside.