Once you have watched the intro to the game you can get started on these two from the first screen:

Listener
For completing the Tutorial


Ensure you select OK when asked if you want to use the tutorial. Don't click Skip at any point when it pops up. At the end of the tutorial (at the first mini-game) this should unlock.


Clicker
Use the Hint 40 times


On the first screen you start at (with the car), once you have completed all actions on the screen and are ready to move to the next area, click the Hint button repeatedly. Since the only hint left on screen is the direction to travel, you will have no cooldown and can complete this within a few seconds.

The following achievements are story related and will unlock as you play:

The Diver
For reaching the sea bottom


Teeth vs Tentacles
Defeat the Kraken


Exorcist
For enabling thunder to reach the portal room


Demon Hunter
Defeat the Demon


Thorough
Pick up 30 items


Extra Thorough
Pick up 50 items

The following achievements are from collectables and there is a fantastic guide from Vic=HKC= here:
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=353207803
The Collector
Gather all of the collectible items


Leaf
Leaf collection complete


Flask
Flask collection complete


Coin
Coin collection complete


Brooch
Brooch collection complete

I won't add pictures for these, as they change randomly for each playthrough. They are all self-explanatory and most will unlock on your first playthrough if you are quick and accurate with your clicking.

(If any don't unlock, restart the game and focus on the first three hidden object scenes. This will usually be for 3 out of 3 and Tic-Tac.)

Eagle Eye
Complete a Hidden Object puzzle in less then a minute


3 out of 3
Finish 3 Hidden Object puzzles without a Hint or missclick


Tic-Tac
Finish 3 Hidden Object puzzles in less than 10 minutes


Independent
Complete a Hidden Object puzzle without a Hint


Clicktastic
Complete a Hidden Object puzzle without a misclick

There are two non-specific mini game puzzle achievements that are self-explanatory. Just do not skip any mini game puzzles and they will unlock.

No Shortcuts
Complete 5 puzzles without skipping them


Mastermind
Finish all the mini games without skipping them

Speedy
Pick up 3 items in 10 seconds


The easiest location for this is at the top of the Lighthouse:

1. Collect the Broom
2. Zoom into the Desk
3. Collect the Lightbulb and the Mouse

Brainiac
Complete a mini game puzzle in less than a minute


This is the first mini game puzzle you come to and can be completed very quickly. There is one button to each side of the flower in the center. Each button turns the flower one place in a single direction.



Press them in the following order:

R x 3
L x 4
R x 9

The Gadgeteer
Finish the Lighthouse mini game on the first try


You need to place each missing piece of the lighthouse mini game puzzle, then adjust them correctly. Adjust the magnifying glass last

Please see the image for the solution:



1. Add the mouse to the wheel
2. Add the lightbulb
3. Add the canon balls
4. Add the pipe
5. Add the magnifying glass
6. Adjust the canon angle to match the pipe
7. Adjust the magnifying glass angle to light the canon fuse

(Thanks to +7 and Absurd Logic for the order adjustment)

Weather Control
Complete Weather Map mini game


Simply follow the compass direction and number of spaces given to move the cloud across the puzzle.

Master Electrician
Complete the Fuse Box mini game in under a minute


You need to have all fuses lit up at once. From the beginning click them in the following order:

Lab Rat
Complete the Labyrinth mini game without a mistake


You need to move your cursor through the maze without going the wrong direction. Once you have begun, do not let go of your mouse click until you have finished the maze and avoid touching the walls. (credit to AyaK4y and TairikuOkami[SK] for mentioning these).

Genius
Finish the magic Square mini game in 40 seconds


Each row, column and diagonal of the board must add up to 18. Here is the solution:

Alchemist
Conjure gold out of stone in 70 seconds


You must complete the mini game puzzle and collect the golden eyes before reaching 70 seconds.


NOTE: Thanks to Absurd Logic -
"The cauldron bottom is very close to the "go back" hotspot, and accidentally exiting the screen will interrupt the achievement."

The solution is:

1. Yellow liquid » 5 flask » Yellow Container
2. Add Yellow & Red liquid into the Cauldron » 7 flask » Orange Container
3. Empty the Cauldron
4. Add Yellow & Blue liquid into the Cauldron » 7 flask
5. Pour from 7 flask » 5 flask
6. Pour remaining liquid from 7 flask » Green Container
7. Empty the Cauldron & Flask
8. Add Blue & Red liquid into the Cauldron » 5 flask
9. Pour from 5 flask » 7 flask
10. Pour from Cauldron » 5 flask
11. Pour from 5 flask » 7 flask
12. Pour from 5 flask » Purple Container
13. Click to collect golden eyes

And that's it! Following this guide you should now have 100% of the achievements!