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