GA Pack-A Achievement
Awarded for completing the "SDGA RANK-A" data pack
Packs are unlocked by playing through the story and simulator and defeating certain enemies for their schematics. Collect 2 to 4 similar schematics and you unlock a pack and an achievement. For each pack the corresponding enemies that hold the schematics are listed as well as their number.
Defeat Primitive Light (No.10), Karyon (No.22), Kurumagakari (No.24).