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