Iron Sky: Invasion

Story related and cannot be missed. Chapter: 2.

The Heinrich and Hermann capital warships are the second and third ones you’ll encounter. They appear together with a slightly better fleet than the Biterolf did in Chapter 1. Nevertheless, the approach should be similar. The most effective way to take them down is to try and destroy their engines first, then cannons, whilst taking out the Wotans as a priority as these are stronger than the Walkyrs and won’t respawn. Then concentrate on the Walkyr ships that protect them. Once you have killed a few of the Walkyrs, the Zeppelin that they came from will open hangar doors to spawn more - this point of the ship is their main weakness, unload all the ammo you can into the hangars to make a good dent in their HP. Rinse and repeat until you have destroyed the warships.

Bear in mind that you can open up your map with  and fast travel to a nearby space station to autosave your progress, fill up on ammo, and then return to the battle at the point where you left.