Here is the full list of all 12 Mortal Kombat Arcade Kollection trophies - there are 7 bronze, 4 silver and 1 gold.
Win 200 matches
Perform your first Animality
Finish all three games
Finish Mortal Kombat II
Finish Ultimate Mortal Kombat 3 on any difficulty
Perform your first Babality
Perform your first Friendship
Finish Mortal Kombat
Win your first double flawless victory against CPU
Win a flawless victory in a ranked kombat
Win your 1st online 1v1
Perform your first Fatality