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