Here is the full list of all 49 Disneyland Adventures achievements.
Won the platinum pin badge on all attractions
Beat Captain Hook and Blackbeard in swordfights
Won the gold pin badge on all attractions
Completed all of the photo albums and autograph books
Completed an attraction chapter with 2 players
Had a photo taken with a character and another player
Won the bronze pin badge on all attractions
Won the silver pin badge on all attractions
Danced perfectly in the Princess Fantasy Faire, "it's a small world" and Alice in Wonderland
Photographed all of the Hidden Mickeys
Conducted a perfect parade
Won the gold pin badge on all 4 of the mountain attractions
Found 21 Secrets in the Haunted Mansion, Jungle Cruise and Winnie the Pooh attractions
Completed all of the adventures in the park
Completed all of the adventures with the Fab Five
Put on an awesome fireworks display
Completed all of the missions for Star Command and Buzz Lightyear
Won the platinum badges on Buzz Lightyear's Astro Blasters and Finding Nemo Submarine Voyage
Completed 50% of Tomorrowland
Completed 50% of Main Street, U.S.A.
Helped Winnie the Pooh and his friends in the Hundred-Acre Wood
Completed 50% of New Orleans Square
Completed 50% of Mickey's Toontown
Completed 50% of Fantasyland
Completed 50% of Frontierland
Completed 50% of Adventureland
Completed 50% of Critter Country
Collected 50% of the Spyglass Secrets
Collected 50% of the Water Squirter Secrets
Conducted a perfect performance from all of the musical acts
Acquired all of the magic items
Collected 50% of the Megaphone Secrets
Collected 50% of the Fishing Rod Secrets
Danced with all of the princesses
Bought an item from each shop in the park
Collected 50% of the Blaster Secrets
Tried to hug all of the villain characters
Photographed half of the Hidden Mickeys
Completed 21 tasks around the park
Ridden on all of the classic rides
Completed an autograph album
Collected 50% of the Wand Secrets
High fived all of the Fab Five
Bought a costume and wore it in the park
Photographed a Hidden Mickey
Taken your first photograph
Completed a task.
Completed the tutorial
Used all of the gestures on the same character