Here is the full list of all 14 Snow Moto Racing Freedom achievements.
Complete all other Achievements
Win gold medals in Time Trial mode on every Track
Win every Freedom League Championship Gold Trophy
Win the gold medal in all Freestyle events
Unlock every snowmobile
Win every Snocross Championship Gold Trophy
Win every Sprint Championship Gold Trophy
Perform every air stunt at least once in a Freestyle Event
Perform every stunt at least once in a race
Jump over 100m
Perform 20 stunts during a Freestyle Event
Perform every ground stunt at least once in a Freestyle Event
In a Sprint Championship race, pass all checkpoints in 1st place and win
Win a Championship event