Here is the full list of all 62 NASCAR Heat 3 achievements.
Completed 10 Multiplayer races
Won 10 races
Won a race
Completed a Multiplayer race
Won a Multiplayer race
Won 25 races
Won 56 races
Won 77 races
Won 94 races
Won 200 races
Completed a race with a 100% race length
Won a race with a 100% race length
Raced at every track
Won a race at every dirt track
Won a race at every road track
Won a race at every short track
Won a race at every speedway track
Won a race at every super speedway track
Won a Split Screen race
Was the Split Screen champion after 4 races
Created a character
Created a custom car paintjob
Completed an Xtreme Dirt season
Completed a NASCAR Camping World Truck season
Completed a full NASCAR Xfinity season
Completed a full Monster Energy NASCAR cup season
Won an Xtreme Dirt championship
Won a NASCAR Camping World Truck championship
Won a NASCAR Xfinity championship
Won a Monster Energy NASCAR championship
Won the Xtreme Dirt series playoffs
Won the NASCAR Camping World Truck playoffs
Won the NASCAR Xfinity playoffs
Won the Monster Energy NASCAR playoffs
Got a rival
Got a friend
Completed one career season
Completed 5 career seasons
Completed 10 career seasons
Earned a spot in the Xtreme Dirt playoffs
Earned a spot in the NASCAR Camping World Truck playoffs
Earned a spot in the NASCAR Xfinity playoffs
Earned a spot in the Monster Energy NASCASR playoffs
Raced in the Xtreme Dirt series on a team
Raced in the NASCAR Camping World Truck series on a team
Raced in the NASCAR Xfinity series on a team
Raced in the Monster Energy NASCAR series on a team
Won a race in Career
Earned 50 million dollars
Owned the maximum number of cars (any series)
Hired the maximum number of employees (any series)
Maxed out all departments (any series)
Maxed out all stats on 1 employee (any series)
Hired your first employee
Trained your first employee
Maxed out a single stat on an employee
Maxed out a single department
Completed a challenge
Completed half of the challenges
Completed all challenges
Won 10 Multiplayer races
Earned a badge in NASCAR Heat Champions