Here is the full list of all 52 Galactic Junk League achievements.
Reach level 30 with the cruiser class
Create a new frigate ship
Win 100 games
Reach level 20 with the cruiser class
Win 50 games
Kill 500 enemies with a missile weapon
Kill 250 enemies with a missile weapon
Earn 100000 Junk
Kill 250 enemies
Upgrade one component
Reach level 10 with the cruiser class
Win 10 games
Kill 100 enemies with a missile weapon
Create a new destroyer ship
Create a new battleship
Win five matches in a row
Kill 25 enemies
Kill 25 enemies with a missile weapon
Earn 10000 Junk
Get five kills in a row without dying
Kill an enemy with a missile weapon
Win your first game
Kill an enemy with a gauss weapon
Create a new cruiser ship
Lose one game
Kill an enemy
Kill an enemy with a laser weapon
Earn 1000 Junk
Research one component
Finish the tutorial
Research all weapons
Research all abillities
Win 200 games
Reach level 10 with the frigate class
Reach level 20 with the frigate class
Reach level 30 with the frigate class
Reach level 10 with the destroyer class
Reach level 20 with the destroyer class
Reach level 30 with the destroyer class
Reach level 10 with the battleship class
Reach level 20 with the battleship class
Reach level 30 with the battleship class
Kill 25 enemies with a laser weapon
Kill 100 enemies with a laser weapon
Kill 250 enemies with a laser weapon
Kill 500 enemies with a laser weapon
Kill 25 enemies with a gauss weapon
Kill 100 enemies with a gauss weapon
Kill 250 enemies with a gauss weapon
Kill 500 enemies with a gauss weapon
Win one match with every class
Earn 1000000 Junk