Here is the full list of all 20 Bread & Fred achievements.
Compltete the Manual
Reach the "Windy Winds"
Fall more than 100m
Complete 100m without falling
Reach the "Fishy Mines"
Complete "Friendly Foothils" mision
Complete "Fishy Mines" mission
Complete "Windy Winds" mission
Complete "The Peak" mission
Complete all misions
Reach the "Last Breath"
Pass the ball 5 times without it touching the floor
Run out of stamina
Win 3 "Rock, Paper, Scissors" games
Bring Jeff to the top (Complete Singleplayer)
Reach the top (Complete Multiplayer)
Collect all photos
Talk to every NPC (Both modes)
Reach the top in less than 2 hours
Complete the game at 100%