Full list of all 46 Sesame Street: Once Upon a Monster achievements worth 1,105 gamerscore.
The base game contains 41 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 5 achievements worth 105 Gamerscore.
You collected all the stars!
You played through every page in the book three times or more!
You and a friend played through every dance page in the book!
You played through a page with a friend!
You washed off the Doo-Rays 10 times!
You reached the bottom of the Tree of Plenty without hitting more than three obstacles!
You fed 50 biscuits to the Puffalopes!
You performed every pose in Seamus's play!
You sent Seamus onstage in three different emperor outfits!
You pulled up 50 weeds in Shelby's garden!
You collected 110 pieces of fruit from the Tree of Plenty!
You ran through the Electric Jungle without hitting any obstacles!
You played through the whole book, then played a page again!
You played through every chapter in the book!
You narrated Ramona's story two or more times!
You told stories with Ramona!
You dusted the snow off of all the monsters!
You went through every wind gust on the sledding run!
You did a trick on the sled!
You helped reunite Tallulah and the Doo-Rays!
You marched in the parade with Tallulah and the Doo-Rays!
You caught a Doo-Ray while parachuting!
You and Grrhoof made friends with the Puffalopes!
You kept your balance and didn't fall in the mud!
You made friends with a Puffalope!
You pulled a stick off of Grrhoof!
You collected 75 stars!
You helped put on a play with Seamus!
You performed the broccoli pose! Now go eat some broccoli!
You gave the dramatic flower chorus something to say!
You helped rebuild an amazing garden with Shelby!
You tuned a set of flowers in 17 seconds or less!
You collected 50 stars!
You planted a seed, watered it, and grew a little sprout!
You threw trash into Oscar's trash can!
You threw a great birthday party for Marco!
You collected 25 stars!
You helped Marco blow out his birthday candles!
You dressed up a monster in Seamus's Fashion Grotto!
You collected 5 stars!
You played through the tutorial!
Pop 50 bubbles!
Dress up an alien like a space cowboy!
Make the color green!
Collect all the notes while the tractor beam is stopped!
Reunite the aliens with their lost egg!