Here is the full list of all 38 Operation: New Earth achievements.
Obtain a Level 30 Hero
Reach Headquarter Level 5
Earn 250 Platinum Rewards in Daily Events
Earn 100 Gold Rewards in Daily Events
Obtain a Level 20 Hero
Earn 50 Platinum Rewards in Daily Events
Defeat 250 Alien Sectors
Complete 250 Drone Missions
Gather 100 million resources from resource sectors
Earn 50 Silver Rewards in Daily Events
Obtain a Level 10 Hero
Earn 25 Gold Rewards in Daily Events
Earn 10 Silver Rewards in Daily Events
Defeat 50 Alien Sectors
Help your Alliance 1,000 times
Capture 1,000 Sectors for an Alliance.
Join an Alliance
Complete 10 Drone Missions
Gather 1 million resources from resource sectors
Upgrade 25 dropships
Build 4 Turrets
Reach Headquarter Level 10
Reach Headquarter Level 15
Reach Headquarter Level 20
Complete 250 Objectives
Complete 1,000 Objectives
Obtain a Level 40 Hero
Obtain a Level 50 Hero
Obtain a Level 60 Hero
Obtain a Level 70 Hero
Defeat 10 Players in Combat
Defeat 100 Players in Combat
Research Titan Tanks
Research Advanced Interceptors
Research Shock Troopers
Research Jet Troopers
Construct 3 Barracks
Construct 3 Factories