Here is the full list of all 13 Mega Man Legacy Collection trophies - there are 9 bronze, 3 silver and 1 gold.
Earn 50 gold metals by completing Challenges.
Earn 50 silver metals by completing Challenges.
Earn 50 bronze metals by completing Challenges.
Complete the "ALL ROBOT RUSH" Challenge.
Complete the "ALL APPEARING BLOCKS" Challenge.
Earn 1 bronze metal by completing a Challenge.
Earn 1 gold metal by completing a Challenge.
Unmask Mr. X and complete Mega Man 6.
Discover the truth about Proto Man and complete Mega Man 5.
Escape the Skull Castle and complete Mega Man 4.
Turn Gamma to scrap metal and complete Mega Man 3.
Take out the Alien and complete Mega Man 2.
Stop Dr. Wily's plans and complete the original Mega Man.