Here is the full list of all 37 Steredenn achievements.
Destroy the Astroworm.
Destroy the Super Chabal.
Destroy the Old Friend.
Destroy the Garbage Collector.
Beat the Red Baron
Destroy the Alien ship.
Complete a boss rush.
Pick all weapons at least once.
Pick all Heavy weapons.
Beat the game using the Blaster only.
Try all upgrades.
Finish the game once.
Finish the first loop.
Destroy the Nemesis.
Meet the Mothership.
Kill 10000 fighters.
Pick all Energy weapons.
Pick all Bots weapons.
Kill a spy with the flamethrower.
Pick all Bullets weapons.
Defeat all the bosses in the Arena at least once.
Destroy the Mothership.
Dies 50 times.
Destroy 100 cargos.
Pick all Melee weapons.
Kill 2500 fighters.
Destroy a Battleship boss.
Destroy a Carrier boss.
Destroy a Cruiser boss.
Destroy a Destroyer boss.
Pick 15 differents weapons.
Kill 1000 enemies.
Kill 500 fighters.
Kill 250 enemies.
Destroy a Frigate boss.
Destroy a Bomber boss.
Kill 50 enemies.