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