Cls atk *.2da

The   files are the .2da files that define the available base attack progressions. These files are used only when referred to by the "AttackBonusTable" column of.

These .2da's have 60 rows (numbered 0 to 59), even though only 20 rows are relevant (since base attack advancement stops depending on class after character level 20).

There are three files of this type provided in the standard game, one for each of the standard base attack progressions. Specifically, the standard files of this type are
 * (+1/level),
 * (+3/4 levels), and
 * (+1/2 levels).