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