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