Easy "Terraformer" Achievement
After building terraformer as the quest requests on story mode, finish all research in the terraformer building. The quest will be finished but achievement not rewarded. Set time to max speed wait like three to five minutes, Mars will be a bit more green, there will be trees etc and you will get the achievement after a few minutes.
Various Steam Achievements
Complete the indicated task to unlock the achievement.
Achievement - How to unlock:
Atomic man - Build two nuclear powerplants.
Captain - Build military base.
Patriot - Destroy invaders.
Pioneer - First human on Mars.
Settler - Colony population is 1000 people.
Survivor - Survive five disasters.
Terraformer - Terraform Mars.
Trooper - Armed to the teeth.