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