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