Here is the full list of all 40 BoxesWithGuns achievements.
Buy 5 weapons
Kill 100 enemies
Move your mouse 10 kilometers inside the game
Move your mouse 20 kilometers inside the game
Finish 1 game without hitting the wall
Check out the ranks
Submit a score to the leaderboards.
Survive a song but destroy not more than 3 ememies
Start the game
Find and submit a bug
Kill 1 000 enemies
Kill 10 000 enemies
Kill 100 000 enemies
Kill 1 000 000 enemies
Lose a game in 5 seconds
Play at least 5 hours
Lose 50 boxes
Lose 100 boxes
Lose 250 boxes
Lose 1 000 boxes
Upgrade a weapon 10 times
Upgrade a weapon 100 times
Upgrade a weapon 1 000 times
Upgrade a weapon 5 000 times
Buy 10 weapons
Buy 100 weapons
Buy 1 000 weapons
Lose a game without losing a box
Total Playtime 40h
Move your mouse 50 kilometers inside the game
Collect 10000 Nuggets
Collect 50000 Nuggets
Survive a song without destroying an enemy
Finish 10 games without hitting the wall
Collect 75000 Nuggets
Collect 100000 Nuggets
Collect 150000 Nuggets
Collect 250000 Nuggets
Collect 500000 Nuggets
Collect 1000000 Nuggets