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