Trackmaster

1. 
   Hat Collector

   Collect all Hats!
   9.2%
2. 
   Daily Challenge

   Finish a Daily Challenge.
   22%
3. 
   Beginner - Bronze

   Finish 10 tracks on Beginner difficulty or higher.
   23%
4. 
   Beginner - Silver

   Finish 100 tracks on Beginner difficulty or higher.
   13%
5. 
   Beginner - Gold

   Finish 1000 tracks on Beginner difficulty or higher.
   8.9%
6. 
   Intermediate - Bronze

   Finish 10 tracks on Intermediate difficulty or higher.
   21%
7. 
   Intermediate - Silver

   Finish 100 tracks on Intermediate difficulty or higher.
   12%
8. 
   Intermediate - Gold

   Finish 1000 tracks on Intermediate difficulty or higher.
   8.9%
9. 
   Advanced - Bronze

   Finish 10 tracks on Advanced difficulty or higher.
   16%
10. 
    Advanced - Silver

    Finish 100 tracks on Advanced difficulty or higher.
    11%
11. 
    Advanced - Gold

    Finish 1000 tracks on Advanced difficulty or higher.
    8.9%
12. 
    Expert - Bronze

    Finish 10 tracks on Expert difficulty or higher.
    14%
13. 
    Expert - Silver

    Finish 100 tracks on Expert difficulty or higher.
    11%
14. 
    Expert - Gold

    Finish 1000 tracks on Expert difficulty or higher.
    8.9%
15. 
    Master - Bronze

    Finish 10 tracks on Master difficulty or higher.
    13%
16. 
    Master - Silver

    Finish 100 tracks on Master difficulty or higher.
    10%
17. 
    Master - Gold

    Finish 1000 tracks on Master difficulty or higher.
    8.4%
18. 
    Multiplayer - Bronze

    Win 10 Multiplayer Races.
    11%
19. 
    Multiplayer - Silver

    Win 100 Multiplayer Races.
    9.2%
20. 
    Multiplayer - Gold

    Win 1000 Multiplayer Races.
    8.4%
21. 
    Powerups - Bronze

    Use 100 Powerups.
    14%
22. 
    Powerups - Silver

    Use 1000 Powerups.
    10%
23. 
    Powerups - Gold

    Use 10000 Powerups.
    9.4%
24. 
    Leaderboard - Bronze

    Reach 1000 Points on the leaderboard.
    14%
25. 
    Leaderboard - Silver

    Reach 10000 Points on the leaderboard.
    11%
26. 
    Leaderboard - Gold

    Reach 100000 Points on the leaderboard.
    8.1%
27. 
    Workshop

    Submit an item to the workshop.
    9.2%
28. 
    Driver Collector

    Collect all Drivers!
    5.2%

Names, descriptions and icons are the game’s own, as Steam publishes them; the share is how many owners have unlocked each, from Steam's global figures for 28 of them.