In Your Face / Not the Face!:
For some reason, you get a stamp for hitting your opponent's face with a ball in single-player mode. Of course, you would never hit them in the face on purpose.
Back from the Brink:
Successfully return a ball that hits the edge of the table and bounces at an unpredictable angle, making it harder to hit. You can only get this stamp in single-player mode.
Epic Rally / 30-Stroke Rally:
Keep up a rally (hitting the ball back and forth without stopping) for 30 hits or more in single-player mode.
Perfectly Matched / A Worthy Opponent:
Draw with your opponent in single-player mode. According to the house rules, a match is declared a draw if neither player can get two points ahead and the score reaches 20-20.
Table Titan / Defeat the Champion: