Here is the full list of all 12 NAMCO MUSEUM ARCHIVES Vol 1 achievements worth 1,000 gamerscore.
Cleared Stage 16 in Xevious.
Ate four Ghosts in Pac-Man.
Cleared Stage 16 in Galaxian.
Cleared Stage 13 in Pac-Man.
Played all titles.
Cleared Stage 19 in Dig Dug.
Cleared Stage 19 in Mappy.
Cleared Stage 26 in Sky Kid.
Obtained the Hyper Shield in Tower of Druaga.
Cleared Stage 12 in Dragon Buster.
Cleared the Blue Dragon Route in Dragon Spirit.
Cleared Stage 7 in Splatter House.