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