Here is the full list of all 20 Cliff Empire achievements.
Fully load trading barge
Reach 7000 population on Earth
Defrost 2000 people
The explosion of the nuclear power plant
More agrarian drones count than ordinary
The moment when two warehouses arrive at once
Fly by personal transport when all your cities have a 1000000¢ in total
Get up by elevator of entertainment center
Complete 100% of all researches
Reach 200 newborn on Earth
Complete 50% of all researches
Complete 25% of all researches
Earn 50000¢
Survive 20 waves of Marauders
Save 20 buildings from fire
Destroy 10 buildings in a row
Critically low ecology
Build 10 buildings at once