Here is the full list of all 16 Delusion achievements.
Find all hidden artifacts.
Spend 15 minutes browsing the album.
Finish all levels with the fallen star collected.
Beat the game.
Finish the "Ouroboros" level after starting with the check pattern.
Finish the "Inside the Core" level using only chargeable blocks.
Go through all tutorials.
Finish the first 5 levels.
Fail to finish a level 7 times in a row.
Activate 100 directional blocks.
Activate 100 square blocks.
Detonate 100 bombs.
Undo a total of 50 moves.
Charge a total of 5,000 blocks.
Generate a total of 300,000 power orbs.
Unlock all achievements.