METAGAL has 11 achievements worth 1,000 gamerscore.
Achievements they've won
Achievements they've not won
Defeat any of your GAL sisters.
Reach a checkpoint on any level.
Die by spikes.
Rebirth with a gear.
Collect 3 gears.
Fall of a level.
Die for the first time.
Collect 2 gears.
Complete the tutorial level with GAL.00.
Collect 1 gear.
Watch the intro without skipping it.