Here is the full list of all 50 Loop-Loop DX achievements.
Get the money bag(s) in zone 6.
Beat zone 5 in 'Adventure Mode'.
Acquire your first refund at the 'Ship Shop'.
Beat zone 4 in 'Adventure Mode'.
Get the money bag in zone 4.
Beat zone 3 in 'Adventure Mode'.
Beat any zone while have the two-shot split. (Excluding zone 1!)
Get the money bag in zone 3.
Obtain the laser weapon!
Beat zone 2 in 'Adventure Mode'.
Get the money bag in zone 2.
Make your first purchase at the 'Ship Shop'.
Beat zone 1 in 'Adventure Mode'.
Beat zone 1 without taking damage.
Beat zone 6 in 'Adventure Mode'.
Defeat 'The Warden'.
See the good ending.
Beat zone 2 without taking damage.
Beat zone 3 without taking damage.
Beat zone 4 without taking damage.
Beat zone 5 without taking damage.
Defeat 'The Warden' without taking damage.
Beat zone 2 with minimum stats.
Beat zone 3 with minimum stats.
Beat zone 4 with minimum stats.
Beat zone 5 with minimum stats.
Go into debt.
Own the Floppy Disk without being in debt.
Buy everything from the 'Ship Shop'.
Survive in 'Bullet Hell Mode' for 30 seconds.
Survive in 'Bullet Hell Mode' for 1 minute.
Survive in 'Bullet Hell Mode' for 2 minutes.
Survive in 'Bullet Hell Mode' for 3 minutes.
Survive in 'Bullet Hell Mode' for 3 minutes and 30 seconds.
Rescue Vektor.
Get the money bag in zone 1.
Turn on the "Speech Sounds" in the pause menu.
Get the money bag in zone 5.
Make it down to layer 25 in 'Legacy Mode'.
Make it down to layer 10 in 'Legacy Mode'.
You discovered what was beyond Layer 0 in 'Legacy Mode'!
Reach layer -1 with all 5 hearts in 'Legacy Mode'.
Survive for 15 seconds in 'Legacy Bullet Hell Mode'.
Survive for 30 seconds in 'Legacy Bullet Hell Mode'.
Survive for 60 seconds in 'Legacy Bullet Hell Mode'.
Pee continuously for 30 seconds.
Hack into Granny Edna's award-winning Pecan Sandy recipe!
Collect 4 money bags within one round of 'Bullet Hell Mode'.
Collect 8 money bags within one round of 'Bullet Hell Mode'.
Achieve every achievable achievement there is to achieve!