Here is the full list of all 33 Tony Stewart's Sprint Car Racing achievements.
Won a race
Won 10 races
Won 25 races
Won 50 races
Won 75 races
Won 100 races
Won 200 races
Completed a 100% length race
Won a 100% length race
Raced at every track
Won a race in split-screen
Won 4 split-screen races in one session
Created a character
Created a custom car
Completed a season in a TQ Midget Car
Completed a season in a 305 Sprint Car
Completed a season in a 410 Sprint Car
Won a season in a TQ Midget Car
Won a season in a 305 Sprint Car
Won a season in a 410 Sprint Car
Completed one season in Career
Completed 5 seasons in Career
Completed 10 seasons in Career
Started a team racing TQ Midget Cars
Started a team racing 305 Sprint Cars
Started a team racing 410 Sprint Cars
Won a race in Career mode
Earned $5,000,000 in Career
Bought a part in Career
Completed a race in Online Multiplayer
Completed 10 races in Online Multiplayer
Won a race in Online Multiplayer
Won 10 races in Online Multiplayer