The Operation Clear Skies Add-on for From Space has 9 achievements.
Complete the Clear Skies mission
Complete the Hedron Energy Project mission
Complete the Diamond in the muck mission
Complete the The Mammoth Gem mission
Complete the The Kraken's Prism mission
Defeat Endless wave level 10
Defeat Endless wave level 25
Defeat Endless wave level 50
Defeat Endless wave level 100