Here is the full list of all 56 Home Sheep Home 2 achievements.
Unlock the London episode by finding 12 socks
Complete any ten bonus levels
Achieve every other achievement
Surf the camper van home in London level 15
Complete London level 15
Complete all episodes
Complete all story levels with three star ratings
Find every wooly sock in the game
Collect everything possible from every level!
Find every joypad to unlock all bonus levels
Get all three sheep flying together using the chimney
Complete London level 10
Cross Big Ben's clockface without moving the hands
Don't touch the football in Space level 6
Change sheep selection just once in Space level 14
Toast Shaun on a rocket in the last space level
Use just 2 'chutes to survive the mineshaft fall
Complete London level 1 with the luggage on board
Get a photo of every sheep in London level 3
Smash 5 speed cameras in a row in London level 3
Complete Space level 15
Find every hidden cake to unlock all bonus modes
Complete Space level 1
Complete Space level 10
Complete any five bonus levels
Complete all bonus levels
Complete Underground level 15
Complete Underground level 10
Find seventy five socks, a lifetime's supply
Complete Underground level 6 with TNT to spare
Complete Underground level 4 without using any TNT
Complete thirty levels with three star ratings
Find a giant cake to unlock developer commentary
Complete Farm level 15
Complete Space level 5
Find fifty socks, enough for any sheep
Solve Space level 4 with only two teleport swaps
Complete any one bonus level
Unlock a bonus level by finding a hidden joypad
Complete London level 5
Complete London level 5 with all chimneys intact
Complete London level 1
Unlock the Space episode by finding 24 cosy socks
Complete Farm level 10
Complete Underground level 5
Find a hidden cake to unlock a special bonus mode
Complete Underground level 1
Complete five levels with three star ratings
Complete Farm level 5
Complete any level with a three star rating
Beat the developers' time on any one level
Find two missing wooly socks
Complete Farm level 1
Complete Ewe-niversity training
Complete Further Ed-ewe-cation training
Complete Graze School training