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