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