Here is the full list of all 12 SEGA Vintage Collection: Monster World achievements worth 200 gamerscore.
Clear every game.
Collect all the Legendary Equipment in Wonder Boy in Monster World.
Collect all the heart containers in Wonder Boy in Monster World.
Use all types of magic in Wonder Boy in Monster World.
Collect all the Life Drops in Monster World IV.
Land 3 consecutive downthrusts without touching the ground in Monster World IV.
Wash your face in the spring at the Pyramids in Monster World IV.
Defeat the Sphinx in Wonder Boy in Monster Land.
Obtain all the Legendary Equipment in Wonder Boy in Monster Land.
Find all the gold hidden in the clouds of Round 7 in Wonder Boy in Monster Land.
Defeat a resilient Ghost in Wonder Boy in Monster Land.
Obtain equipment from a defeated enemy in Wonder Boy in Monster Land.