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