  In this survey we revisit {\sc finite subtraction}, one-heap subtraction
games on finite rulesets. The main purpose is to give a general overview of the
development, and specifically to draw attention to Flammenkamp's thesis (1997),
where he, contrary to other studies, experimentally observes exponential
eventual period length of the outcomes, for a carefully selected subclass of
games. In addition, we contribute an appendix on {\sc finite excluded
subtraction} by Suetsugu.
