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