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