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