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