Here is the full list of all 12 Yu-Gi-Oh! 5D's Decade Duels Plus achievements worth 200 gamerscore.
100 wins in Tag Duel
200 wins in any mode
Inflict at least 1 million total damage
100 wins in Single Mode
Defeat Jack
Defeat Yusei
Win a Tag Duel for the first time
Save an original Deck Recipe
Play a Tag Duel
Win a Preliminary Tournament
Win and get a Rare Card
Play a single player game