Here is the full list of all 21 Cosmica achievements.
Win one Battle
Win one Game
Win 25 Games
Win 100 Games
Play 10,000 Cards
Win with No Equipment
Win 10 Games
Unlock Conrad's Friendship Necklace
Unlock Tom's Buyiku Sculpture
Unlock Kato's Intel
Unlock Eithvad's Tatter Tech
Unlock Viator's Page
Unlock Cog's Data Chip
Unlock LT's Doubloon
Unlock Ahren's Pride
Unlock Nat's Legit License
Unlock Adams' Data Chip
Unlock Tadh's Comrade
Unlock Periit's Trophy Tooth
Unlock Activated Quinzat
Unlock Octo-Vault Code