Here is the full list of all 50 Nib achievements.
Survive the first wave
Kill 50 Slicers
Kill 50 Pirates
Recruit 500 High Magi
Recruit 1000 Templar
Defeat 2500 Enemies
Defeat 7500 Enemies
Defeat 15,000 Enemies
Defeat 25,000 Enemies
Defeat 50,000 Enemies
Defeat 100,000 Enemies
Construct 150 Buildings
Collect 1,000,000 Resources
Research 100 Technologies
Complete Level I
Complete Level II
Complete Level III
Transform Warlord to Legendary Super Warlord
Heal 150,000 Health
Upgrade Goliaths to Collossos
Achieve Silver Score-Rank
Achieve Gold Score-Rank
Defeat 500 Enemies
Upgrade Magi to Highmagi
Achieve Diamond Score-Rank
Achieve F Score-Rank
Achieve Bronze Score-Rank
Defeat 2500 Pirates
Defeat 2500 Slicers
Defeat 3000 Waves
Defeat the Maggot
Defeat the Crow
Defeat the Talesteller
Defeat the Pharao
Defeat the Tyrant
Lose 25 Games
Defeat 500 Tyrantguards
Defeat 10 Slicers
Beat a Level in Tourist Difficulty
Beat a Level in Warrior Difficulty
Beat a Level in Demigod Diffculty
Generate 100,000 Food with Fruitgardens
Recruit 500 Combatants
Defeat 250 Anubites
Make 50 trade decisions
Play as Assyrian, Babylonian and Median Faction
Adapt Policies for 30 times
Win a game without building a temple
Win a game without adopting policies
Win a game without building Towers and Forts