Here is the full list of all 36 Ninja Tycoon achievements.
Survive Arcade Mode for 1 Year
Take over the final Region
Use a Workshop Unit
Play Arcade Mode
Send a Ninja to reinforce the previous Outpost
Let the reinforcements bar reach 290
Complete a Mission of Difficulty 1 with a Level 100 Ninja
Take over a Region
Send a Ninja to secure a Region
Build 4 Training Fields
Assassinate the Clan Leader
Complete a Mission with Difficulty 10
Complete a Mission with Difficulty 7
Craft 30 Pieces of Equipment
Recruit 10 Ninjas
Unlock all Research
Fully Max a Ninja
Craft a Tier 3 Equipment
Hold 5000 Gold
Gather a Diamond
Complete a Mission with 5 Ninjas
Research Training Field 3
Craft a Tier 2 Equipment
Research Tower 2
Build a Hospital
Specialize a Ninja
Kill 200 Raiders
Hire 30 Workers
Complete a Mission with Difficulty 4
Research Build Area 2
Craft a Tier 1 Equipment
Construct 20 Buildings
Gather 1000 Wood
Survive a Raid
Complete a Mission
Recruit a Ninja