Here is the full list of all 30 Iron Sky: Invasion achievements.
Destroy the Götterdämmerung.
Detonate the Überasteroid.
Destroy 50 Alberich ships.
Destroy 10 Hunding ships.
Complete all US President missions.
Purchase all upgrades for the Dundee bomber.
Destroy 20 Wotan ships.
Destroy the Walther capital warship.
Destroy the Tannhäuser capital warship.
Destroy 20 Hanebu IV ships.
Destroy 100 Rheingold ships.
Collect 100 salvage.
Safely escort Renate to the moon.
Acquire the Spitfire frigate.
Destroy the Herrmann capital warship.
Destroy the Heinrich capital warship.
Destroy the Biterolf capital warship.
Acquire the Xerg light fighter.
Complete the tutorial part of the game.
Destroy all drones in the Shooting Range in less than 30 seconds.
Acquire the Canadarm heavy bomber.
Acquire the Banzai heavy fighter.
Destroy the Wolfram capital warship.
Repel the meteorblitzkrieg.
Complete all Indian side missions.
Complete all Russian side missions.
Collect 500 salvage.
Destroy 300 Walkyr ships.
Destroy 10 Brünnhilde ships.
Purchase all upgrades for the Korean light fighter.