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