Here is the full list of all 14 Metal Black S-Tribute achievements.
Complete stage 1
Complete stage 2
Complete stage 3
Complete stage 4
Complete stage 5
Complete the final stage
Get a perfect in the first bonus stage
Get a perfect in the second bonus stage
Make a score of 300 000 points
Make a score of 500 000 points
Get the bad ending
Get the true ending
Release an Energy beam when the energy gauge's level is MAXed.
Play the game 10 times