Below 100000 O2, 10000 Pascals, 150000 water and 200000 mk will result barren and plantlife will don’t survive. When you reach plants can survive, But is hard. The best goal for the terraforming Mars is oxygen, but fastest thing is pressure. Some sites found Mercury has most oxygen in atmosphere (49%), But no planets in solar system oxygen atmosphere is 50%. It's almost no atmosphere it's impossible to be have a oxygen. I found a bug, Venus atmosphere is similar to Earth.
I hope the Mars takes too long to terraform in the game. But incoming transmission and genesis points helps to terraform mars faster. 4 billion years ago mars like earth with life but some reasons what why atmosphere is thinned, oxygen is lost, become colder or water is gone. Something what mars lost magnetic field and all plantlife is lost. But in future mars looks like different and gets terraformed.
