Here is the full list of all 50 MUD Motocross World Championship achievements.
Reach Level 50 in Multiplayer
Finish in one of the first three positions without falling in Official Mode
Complete 100 races in Multiplayer
Reach Level 20 in Multiplayer
Take part in 20 races in Multiplayer
Unlock all MX1 Teams in MUD World Tour
Beat Cairoli in the first race of a Championship in Official Mode
Accomplish your Heroes' Trick Crew Target 10 times in MUD World Tour
Buy all Levels, Events and Heroes in MUD World Tour
Complete at least one race on all 12 Official Tracks in any Game Mode
Complete 150 races in any Game Mode apart from Qualifying Mode
Earn 450 experience points in a Quick Race in Multiplayer
Win a Monster Energy FIM MXoN in Multiplayer
Buy all the Trick Cards in MUD World Tour
Unlock all helmets in MUD World Tour
Do 15 Holeshots in any Game Mode!
Customise a Championship in Official Mode
Win a Quick Race in Official Mode
Buy the 13th Level in MUD World Tour
Do 25 Burning Starts in any Game Mode!
Buy the 9th Level in MUD World Tour
Reach 5 points in one of your Hero Skills in MUD World Tour
Buy all the Energy Drink Cards in MUD World Tour
Accomplish your Heroes' Team Target 20 times in MUD World Tour
Buy the 5th Level in MUD World Tour
Pass through a total amount of 250 Checkpoints in MUD World Tour
Win a Quick Race in Multiplayer
Create a Lobby and Start a race!
Buy the 2nd Level in MUD World Tour
Buy your first equipment card in MUD World Tour!
Reach the top (10 points) in one of your Hero Skills in MUD World Tour
Complete a race with a Hero with the right Talent for that Event in MUD World Tour
Select the same gate number 5 times on different tracks
Perform 30 Scrubs in any Game Mode!
Complete a Monster Energy FIM MXoN race in Official Mode
Enter for the first time in the Main Page of MUD World Tour
Fall a total of 10 times in a race in any Game Mode
Enter for the first time in Photo Mode Camera of any game mode
Enter the Main Menu
Win the Monster Energy FIM MXoN Event in MUD World Tour
Win all the events of at least one Level with all your Heroes in MUD World Tour
Win all the events of at least one Level in MUD World Tour
Win all the events of all the Levels in MUD World Tour
Complete a hard Quick Race of 7 minutes + 2 laps in MUD World Tour
Pass through 45 Checkpoints in the same Checkpoint Race in MUD World Tour
Visit one of the available Arenas in MUD World Tour
Stay in first position from the Holeshot to the end of a Championship Race in Official Mode
Finish in one of the first 3 positions in the first 3 Races of a Championship in Official Mode
Beat Roczen in a Championship in Official Mode
Win an MX1 Official Championship in Official Mode