Here is the full list of all 54 Lost Marbles achievements.
Complete all "Beginner" rated Time Trials
Complete all “easy” rated Time Trials
Complete all “Medium” rated Time Trials
Complete all “Hard” rated Time Trials
Complete all “Insane” rated levels
Complete all Time Trials
Complete all Time Trials without dying or restarting from a checkpoint
Earn a platinum medal on all Time Trials
Impressive speed…
Achieve the best possible rating in the Time Trials
Complete way too many Time Trials…
Achieve a score on all Score Attack levels
Earn a platinum medal on all Score Attack levels
If you weren’t using a purple marble skin while doing this I’ll be disappointed
I don’t exactly know how you did that, but it was impressive!
Earn a score of 3000 on “Sprawling”
Complete all arcade playlists (Except the final test)
Complete “The Final Test”
Prove you know the ropes by setting a crazy time on “Learning the Ropes”
Complete “The Final Test” with less than 10 deaths and at least a gold medal
Earn the blazing speed medal on “The Final Test”
View the global ratings with a personal rating of gold or above
The student has indeed became the master
I promise…
Wait… How did you do that?
You flew just a little too close to the sun, had there been one…
Equip an unlocked marble skin
It was you, but don’t tell them I said that...
Are you SURE you understand what they did there?
Play the game a total of 10 hours
Please, come spend some time with me...
Visit the “How to Play” page.
No… Not that…
Find and collect your first hidden marble skin
Find and collect X hidden marble skins
Find and collect all hidden marble skins
Complete the marble collection
Complete way too many Gem Arenas
Collect a crazy number of gems throughout your time playing
Why must you keep repeating yourself?
What's the password?
It's probably costing you nothing to run this game right now, huh?
Enable the legacy levels from the gameplay settings
Complete all legacy levels
I trust that you will do the right thing
That score was pretty "1337"!
Get an average score of 640 on "Minuteure" with at least 10 scores in the session (Random seeds only)
Earn a Challenge trophy
Earn 25 Challenge trophies
Find and collect your first scavenge loot
Find and collect all scavenge loot
Find and collect a scavenge loot within 30 minutes of it spawning
Complete all spotlight levels within a single cycle
Unlock 25 Remix Levels