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