Here is the full list of all 36 Trillion: God of Destruction achievements.
Began a second playthrough!
Defeated Trillion in its Final Form!
Opened up all the Demon Seal slots!
Defeated Trillion in its Dragon Form!
Defeated Trillion in its Titan Form!
Amassed a variety of Active Skills!
Amassed a variety of Passive Skills!
Inflicted 10 billion damage with one hit!
Defeated Mokujin with one hit!
Reached the MAX level in a relationship!
Got 100,000G!
Challenged the Valley of Swords for the first time!
Unlocked "Holy Illusion"!
Completed all entries in the Gift Guide!
Used Order for the first time!
Broke through Trillion's outer armor!
Leveled up a skill to the max!
Retreated for the first time!
Gave someone the best present ever!
Executed Fever Time for the first time!
Executed Double-Up for the first time!
Gave a present for the first time!
Used Interact for the first time!
Trained for the first time!
Performed a stat increase for the first time!
Powered up a weapon or opened up a slot!
Obtained every trophy!
Watched all the lovey-dovey endings!
Defeated Trillion with one of the first three Overlords!
Cleared Challenge Mode!
Watched the true ending!
Watched everyone's hot springs event scenes!
Affection Points have surpassed 1 billion!
Used every Death Skill!
Strengthened a weapon by +30!
Strengthened a weapon by +10!