Iron Sky: Invasion

The "Rheingold" is the second most common enemy ship in the game. They aren’t very strong and they don’t have great armor either. Their trickery comes in the form of speed, they are quite fast and will twist and turn out of trouble. They are taken down easily with your standard gun, they have countermeasures in the form of flares which means missiles won’t work against them. Simply take down 100 of them over the course of the game to unlock this trophy.

You can check on 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 that 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.