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