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