Ended the forest challenges achievement in A Boy and His Blob

Here is a video guide on how to do all the forest challenges:
Part 1:
Part 2(challenges 11 + 12):
Please note challenges 11 + 12 can only be unlocked after you have completed the citadel world and return to the forest world.Same here 83%. When the achievements went alive I was on 0, even finished with the first 2 levels, so I repeated them and my % went up after each...Having just done it and not got the achievement either I did notice something...there are only 7 items you can interact with around your hideout, not 10 and you should get one for every time you finish a challenge right?Ok guys i figured it out, there are a total of 12 challenges for the forest world. After completing the citadel world go back to the forest world and there will be 2 more levels where you have to collect all 3 chest. After that beat the final boss for the final boss achievement and do the remaining 2 challenges.

Here is a video guide for challenges 11 and 12 as 12 can be a little tricky:

You sir, are a gent!No worries, i enjoy making these videos and guides i just finished forest world but now im in a house and i have only done 9 challenges on forest world as it went straight to a boss fight after i finished challenge 9.

how do i get back to forest world? im still in the house which must be the next world but the map won't let me go back to forest world, it will only allow me to play this new world.

Posted by JPG30 On 22 Jan 16 at 21:08ignore the above, i have found it now.Posted by JPG30 On 22 Jan 16 at 21:38Duh two extra challenges, silly game designers!!+1 from me,i thought game was glitched at 10

good guides aswell

Seems to be glitched, I finished all 12, they all show green and still no trophy.