The All Under Heaven Add-on for Crusader Kings III has 20 achievements.
Starting as Jarl Hæsteinn in 867, become Hegemon of China
Claim the Mandate of Heaven as the Head of Faith of a Christian faith
Starting as the Crysanthemum Throne, restore direct imperial rule
As a Mandala ruler, have a Godlike level of piety, rule an empire, and have 100 radiance
Starting as landless, work your way up to becoming a Minister in China
Claim the Hegemony of China and choose a name for your new Imperial Dynasty
Successfully use the Eradicate Casus Belli against a House that you have a Feuding Relation with
Become Shōgun, holding the Empire of Japan, as Minamoto no Yoritomo in 1178
Max out your mandala Aspect and have a Grand Temple Complex
Finish the Confucian Education track and have 5 disciples
Have max cohesion in your Bloc
Reach the highest level of Merit
Take the Unite the Husamguk decision
Found the Dai Viet Empire
As a Wanua ruler, adopt Mandala government through your Suzerain, and build a Capital Complex
Pass all Exams with one character
Starting as a ruler of a culture with no Silk Road Innovations, discover a Silk Road Innovation
Adopt Sōryō government as a Ritsuryō ruler
Starting as a character that has not passed any Exam, pass an Exam in China
Permit a group of religious exiles to settle in your realm