<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

sub.o: sub.c expr.h config.h Str.h op.h IO.h re.h stack.h xmalloc.h \
  strhash.h val.h kork.h list.h sub.h variable.h main_opt.h \
  transmogrify.h text.h