Iron Sky: Invasion

The "Hanebu IV" ships have good weapons, are strong and have decent armor. They are taken down via their weak spots which are the underside, and also the engines. They have countermeasures in the form of flares which means missiles won’t work so well against them. Simply take down 20 of them over the course of the game to unlock this trophy.

You can check how many you have destroyed by pressing  and then Statistics. The enemies you have killed will be listed in order from most to least.

All the trophies for destroying X amount of ships can be farmed, however the game creates a save for each individual chapter meaning when you load a previous save, your stats will reset to what they were when you've completed the chapter. If you follow the Roadmap you will not need to farm any of the kills, the majority will unlock during Chapters 3 & 4.

Remember to check your map with  if you want to actively seek them out.