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