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