Here is the full list of all 37 Steredenn achievements.
Beat the game using the Blaster only.
Finish the first loop.
Defeat all the bosses in the Arena at least once.
Try all upgrades.
Finish the game once.
Pick all weapons at least once.
Destroy the Nemesis.
Meet the Mothership.
Destroy the Mothership.
Kill 10000 fighters.
Kill a spy with the flamethrower.
Destroy a Battleship boss.
Pick all Heavy weapons.
Pick all Bots weapons.
Pick all Energy weapons.
Pick all Bullets weapons.
Destroy a Carrier boss.
Pick all Melee weapons.
Dies 50 times.
Destroy a Cruiser boss.
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.
Destroy a Bomber boss.
Kill 50 enemies.
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.