I realise this is a little cheeky, but here are the links to all four Achievement Walkthroughs for the wonderful Wallace & Gromit's Grand Adventures by TellTale Games LLC;
Episode 1 - Fright Of The Bumblebees.
Episode 2 - The Last Resort.
Episode 3 - Muzzled.
Episode 4 - The Bogey Man.
All four walkthroughs in one handy thread! How desperate am I?