Here is the full list of all 12 Space Invaders Extreme achievements worth 200 gamerscore.
Won 25 online matches in VS Mode.
Won an online match for the first time.
Completed the game in Co-op Arcade mode.
Achieved Rank S 3 times.
Completed the game in Arcade Mode.
Achieved Rank A at the end of a level.
Achieved 1 ROW using the Nagoya Attack technique.
Defeated a Boss Invader without missing a shot.
Triggered at least 4 rounds of Fever Time.
Defeated the first Boss Invader.
Defeated a wave of invaders without missing a shot.
Destroyed at least 21 invaders in a row.