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