Here is the full list of all 26 Moorhuhn Kart achievements.
Win farm level offline
Win winter level offline
Win island level offline
Win Egypt level offline
Win factory level offline
Win mine level offline
Win castle level offline
Win swamp level offline
Win farm level online
Win winter level online
Win island level online
Win Egypt level online
Win factory level online
Win mine level online
Win castle level online
Win swamp level online
Win championship 1
Win Championship 2
Win 5 Offline Races
Win 5 Online Races
Win 10 Offline Races
Win 10 Online Races
Play 50 Race
Play 100 Race
Lose 10 races
Lose 50 race