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