Here is the full list of all 38 Battle Garegga Rev.2016 achievements worth 1,000 gamerscore.
Saw the ending for Bornnam using player 1.
Saw the ending for Miyamoto using player 1.
Saw the ending for Chitta using player 1.
Saw the ending for Gain using player 1.
Destroyed the propeller on the front of NOSE LAUGHIN, the boss of the VALLEY stage.
Saw the ending for ship No. 4 using player 1.
Cleared Premium Mode.
Saw the ending for ship No. 3 using player 1.
Destroyed the fragment of GLOW SQUID using a Special Weapon when it escaped from KING CRIMSON.
Acquired the maximum amount of stock for Special Weapons.
Destroyed the fragment of Slayer in the CLOUD stage using a Special Weapon.
Used Player 1 to achieve the special power up by using shot power.
Cleared Arcade Mode.
Saw the ending for ship No. 2 using player 1.
Got a game over before releasing the pink flamingos in the PLATEAU stage.
Achieved the Special Formation with Player 1.
Cleared Super Easy Mode.
Saw the ending for ship No. 1 using player 1.
Defeated the final form of GLOW SQUID, the AIRPORT boss.
Destroyed the first form of GLOW SQUID, the AIRPORT boss.
Destroyed BLACK HEART mk2 in the AIRPORT stage.
Destroyed JUNKY MONKEY, the BASE stage boss.
Destroyed the giant laser in the BASE stage using a Special Weapon.
Destroyed FORTRESS in the BASE stage.
Destroyed BLACK HEART, the CLOUD stage boss.
Destroyed SLAYER in the CLOUD stage.
Destroyed MAD BALL Rev. in the CLOUD stage.
Destroyed NOSE LAUGHIN Rev. in the CLOUD stage.
Destroyed SATANIC SURFER, the PLANT stage boss.
Destroyed EARTH CRISIS, the FACTORY stage boss.
Acquired an Extend item.
Destroyed MAD BALL, the PLATEAU stage boss.
Stopped the giant tank in the PLATEAU stage by destroying its tracks.
Destroyed an enemy with shrapnel when your ship, or some weapons from ship No. 1, were destroyed.
Destroyed NOSE LAUGHIN, the VALLEY stage boss.
Acquire 4 Large Special Weapon items within 10 seconds.
Release the pink flamingos in the PLATEAU stage.
Complete all achievements.