Surviving Mars
80 Achievements
0-1h
GOG
Skies of Blue
Create blue skies by terraforming
12.1%
How to unlock the Skies of Blue achievement in Surviving Mars - Definitive Guide
For this achievement, you must raise the atmosphere statistic to 50 percent. The main two ways to increase atmosphere are with carbonate processors, which are unlocked via the Carbonate Processor research (terraforming) and the Import Greenhouse Gases special project, which is unlocked via the Interplanetary Projects research (terraforming).
Raise your Atmosphere parameter to above 50% by building Carbonate Processor and Magnetic Field Generators, then completing the "Import Greenhouse Gases" planetary project.