Surviving Mars
80 Achievements
0-1h
The Garden of Eden
Play as Church of the new Ark and have 250 Colonists at 70+ Comfort before Sol 100
0.7%
How to unlock the The Garden of Eden achievement in Surviving Mars - Definitive Guide
The Church has a doubled birthrate perk as well so you'll get plenty of martianborn colonists from the mid game onwards meaning you should hit 250 colonists around sol 75.
The hardest thing about this achievement is the early game as you only have 1 rocket, get no sponser research and recive a low amount for rare metal sales.
I suggest playing with the modifiers prefab colony, fast scanning, fast rockets, increased production & extra applicants. No disasters or events is optional depending on your preference (Both can help or hinder)
None of these options disable achievements.
Pick Church of the new Ark as mission sponsor and Ecologist as commander profile. Beware that this isn't an easy task as this mission sponsor only gives you 1 Rocket to start and very very little funding. It is imperative that you secure a Rare Metal deposit and start exporting ASAP.
Once you've got your economy running, build domes near Vistas, which will provide comfort boosts to your colonists and build the Hanging Gardens spire where possible in each dome if you've got plenty of water, otherwise build the Temple spire. Grow your colony to about 300+ colonists, keep them happy with lots of Dome service buildings and this should come naturally two-thirds of the way to 100 Sols.