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 narrated Ramona's story two or more times!
You played through the whole book, then played a page again!
You collected all the stars!
You played through every chapter in the book!
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 made friends with a Puffalope!
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 collected 75 stars!
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!
Run through the Electric Jungle without hitting any obstacles!
Collect 110 pieces of fruit from the Tree of Plenty!
Pull up 50 weeds in Shelby's garden!
Send Seamus onstage in three different emperor outfits!
Perform every pose in Seamus's play!
Feed 50 biscuits to the Puffalopes!
Keep your balance, and don't fall in the mud!
Reach the bottom of the Tree of Plenty without hitting more than three obstacles!
Wash off the Doo-Rays 10 times!
Play through every page in the book three times or more!
Play through any page with two players!
Play through every dance page in the book with two players!
You dressed up an alien like a space cowboy!
You reunited the aliens with their lost egg!
You collected everything while flying with the aliens!
You made the color green!
You popped 50 bubbles!