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 played through every page in the book three times or more!
You and a friend played through every dance page in the book!
You ran through the Electric Jungle without hitting any obstacles!
You went through every wind gust on the sledding run!
You collected all the stars!
You narrated Ramona's story two or more times!
You performed every pose in Seamus's play!
You sent Seamus onstage in three different emperor outfits!
You fed 50 biscuits to the Puffalopes!
You collected 110 pieces of fruit from the Tree of Plenty!
You washed off the Doo-Rays 10 times!
You kept your balance and didn't fall in the mud!
You played through a page with a friend!
You tuned a set of flowers in 17 seconds or less!
You played through the whole book, then played a page again!
You played through every chapter in the book!
You told stories with Ramona!
You dusted the snow off of all the monsters!
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 reached the bottom of the Tree of Plenty without hitting more than three obstacles!
You caught a Doo-Ray while parachuting!
You and Grrhoof made friends with the Puffalopes!
You made friends with a Puffalope!
You collected 75 stars!
You pulled a stick off of Grrhoof!
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 collected 50 stars!
You helped rebuild an amazing garden with Shelby!
You pulled up 50 weeds in Shelby's garden!
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!
You reunited the aliens with their lost egg!
You collected everything while flying with the aliens!
You made the color green!
You dressed up an alien like a space cowboy!
You popped 50 bubbles!