Here is the full list of all 37 Steredenn achievements.
Meet the Mothership.
Destroy the Mothership.
Destroy the Super Chabal.
Kill 10000 fighters.
Pick all weapons at least once.
Pick all Heavy weapons.
Destroy a Battleship boss.
Pick all Bots weapons.
Pick all Energy weapons.
Kill a spy with the flamethrower.
Pick all Bullets weapons.
Pick all Melee weapons.
Destroy a Carrier boss.
Destroy 100 cargos.
Destroy a Destroyer boss.
Destroy a Cruiser boss.
Dies 50 times.
Kill 2500 fighters.
Pick 15 differents weapons.
Kill 1000 enemies.
Kill 500 fighters.
Destroy a Frigate boss.
Kill 250 enemies.
Destroy a Bomber boss.
Kill 50 enemies.
Destroy the Nemesis.
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.