Here is the full list of all 18 LCD Sports: American Football achievements.
Sacked the Quarterback. (Single-player)
Won a game on EASY difficulty setting. Earned in single player mode.
Won a game on NORMAL difficulty setting. Earned in single player mode.
Won a game on HARD difficulty setting. Earned in single player mode.
Team was involved in a tie game. Earned in single player mode.
Won a game while scoring less than 10 points. Earned in single player mode.