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