Here is the full list of all 28 Adventures of Chris achievements.
Complete the introductory segment
Successfully complete the Mexico level
Successfully complete the Malaysia level
Successfully complete the Transylvania level
Successfully complete the Japan level
Successfully complete the Los Angeles level
Successfully complete the Chile level
Successfully complete the Great Barrier Reef level
Successfully complete the Siberia level
Find all 8 national flags
Find all 8 Sky Book Encyclopedia volumes
Hit Chris's cookie limit
Rescue all 3 balloon puppies in the Kingdom of Lost Balloons
Joined the Cirrus Club
Successfully complete the Geography Trivia mini-game
Beat the game in Story Mode (Recommended Difficulty)
Beat the game in Mean Mode (Recommended Difficulty)
Reconcile the Reds and Assorteds
Win at least once while playing the slots mini-game
Try the Retro Recipe
Beat the secret boss in Story Mode (Recommended Difficulty)
Beat the secret boss in Mean Mode (Recommended Difficulty)
Defeat Count Junior when you first meet him
Beat the game in Story Mode (Hard For No Reason Difficulty)
Beat the game in Mean Mode (Hard For No Reason Difficulty)
Beat the secret boss in Story Mode (Hard For No Reason Difficulty)
Beat Story Mode with only required upgrades and abilities (Recommended Difficulty)
Beat the secret boss in Dev Commentary mode