Many games not only display a score, they translate that score into a rank, along the lines of
"Your score is 0 of a possible 10, in 0 moves. This makes you a tourist. "
To get TADS 3 to do this you need to set up a scoreRankTable on the gameMain object, for example:
initialPlayerChar = me
[ 0, 'a tourist'],
[ 5, 'a novice explorer'],
[ 10, 'a willing amateur'],
[ 15, 'an apprentice adventurer'],
[ 25, 'an accomplished adventurer'],
[ 40, 'a hero']
Note how this works: the scoreRankTable is a list, each element of which is itself a list of two elements, a number and a single-quoted string. The number is the minimum score needed to reach the rank described in the string. These two-element sublists must be arranged in ascending order of score.