Here is the full list of all 22 Along Together achievements.
Bring Rishu home.
See a shooting star.
Reach the end of the Caves.
Reach the end of the Forest.
Find 7 treasures.
Work with Rishu to cross the bridge in Level 2-1.
Hit 20 targets with the slingshot.
Make a stalactite splash down in the water.
Find a treasure.
Find every treasure in the game.
Find all treasures in the Forest.
Find all treasures in the Caves.
Find all treasures in the Junkyard.
Don't leave the kid hanging.
Score 5 points on the handheld game.
Score 20 points on the handheld game.
Play with every treasure at least once.
Crush 5 cars in the junkyard.
Pet Rishu.
Complete Level 1-2 without shooting any birds.
Knock down all the apples in 1-3.
Score 40 points on the handheld game.