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