since i explained the combo system of Zero Sum on instagam, might as well do it here
here is how it works: the whole combat system is designed to reward clean math combos and encourage operator variety, so there are three parts to it:
- smart plays: clean divisions, roots, modulos, multiplication below *1. e.g. 14/2 = 7 is a smart play, because it divides the 14 cleanly into something smaller
- lazy plays: -1, 1, *1. they can combo with each other, they dont give penalties, but are not considered smart plays, cause it's super lazy, but -1 and 1 can of course finish combos without any penalty
- unclean plays: 15/2 =7,5 7.5, which results in a "7" enemy and a second, smaller "5" enemy, which is an unclean play and breaks the combo
combining smart plays leads to clean combos, which lead to clean combo chains and ultimately into perfect waves, which give the most amount of rewards for the in-between-wave shop and the upgrade tree.
lazy and unclean plays will break your perfect wave progression.
so there are 2 extremes to beat a level: low operator spam (lazy/uncleans) and smart operator usage. both can lead to success, but the spammy way is harder :)
pro tip: the easiest way to get perfect waves early on is with the multiplication slow field upgraded to *0.9, its very beginner friendly, slows enemies, increases combo counter and counts as clean play. drawback is the extreme increase in ammo cost.