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