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