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