Here is the full list of all 61 PixelJunk Eden achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete Garden 15 by collecting all 5 Spectra.
Collect all Spectra.
Complete Garden 14 by collecting all 5 Spectra.
Get a Spectra after bouncing off a rock (or rocks) more than once.
Get fifteen crystals in a single jump.
Pollen Prowler combo x 10.
Complete Garden 13 by collecting all 5 Spectra.
Complete Garden 12 by collecting all 5 Spectra.
Complete Garden 11 by collecting all 5 Spectra.
Kill three different types of enemy in a single jump.
Collect 5 crystals while flying in slow motion.
Get all the Spectra in gardens 01 - 10.
Complete Garden 10 by collecting all 5 Spectra.
Complete Garden 09 by collecting all 5 Spectra.
Open all seeds in garden 09.
Complete Garden 08 by collecting all 5 Spectra.
Defeat all 500 Pollen Prowlers.
Complete Garden 07 by collecting all 5 Spectra.
Get a Spectra in each garden 01 - 10.
Complete Garden 06 by collecting all 5 Spectra.
Complete Garden 05 by collecting all 5 Spectra.
Collect 30 Spectra.
Open all seeds in garden 05.
Fly a long distance using a cannon.
Complete Garden 04 by collecting all 5 Spectra.
Open all seeds in garden 04.
Complete Garden 03 by collecting all 5 Spectra.
Open all seeds in garden 03.
Open all seeds in garden 02.
Complete Garden 02 by collecting all 5 Spectra.
Collect 10 Spectra.
Get all 5 Spectra in any garden within 10 minutes.
Fully complete a garden a second time.
Open all seeds in garden 01.
Use a quick warp.
Get all 5 Spectra in one garden.
Complete Garden 01 by collecting all 5 Spectra.
Defeat a Guardian enemy.
Open 3 seeds in succession without gripping a plant.
Pollen Prowler Combo x 5.
Get your first Spectra.
Make a plant grow for the first time.
Visit the world of Eden for the first time.
Open all seeds in garden 06.
Open all seeds in garden 07.
Open all seeds in garden 08.
Open all seeds in garden 10.
Pollen Prowler combo x 15.
Collect 100,000 pollen.
Open all seeds in garden 11.
Open all seeds in garden 12.
Open all seeds in garden 13.
Open all seeds in garden 14.
Open all seeds in garden 15.
Get all the Spectra in gardens 11 - 15.
Get two Spectra in a single jump.
Open ten seeds in a single jump, without gripping a plant.
Reach the highest position in the tallest garden of Encore.
Get thirty crystals in a single jump.
Defeat an enemy using a drop attack.
Collect 1 Spectra in any garden within 1 minute.