Here is the full list of all 12 Feeding Frenzy 2: Shipwreck Showdown achievements worth 200 gamerscore.
Awarded for your first fish upgrade in the single player story mode
Awarded for eating 5000 fish
Awarded for accumulating 3 simultaneous fish shields
Awarded for completing a 'Barracuda Bonus'
Awarded for completing a Quadruple Flip
Awarded for reaching the maximum FRENZY multiplier in a single player game
Keep playing!
Defeat the Intruder!
Come first in a Frenzyfest Tournament
Complete Time Attack!
Compete in Party Games to accumulate 1000 Party Points
Eat 500 entire schools of fish, or swarms of bugs