Affinities refer to the strengths and weaknesses against enemies with different affinities. There are four types: Electric, Thermal, Chemical, and Antimatter.
Thermal: Prevails over Chemical but is susceptible to Electric.
Chemical: Dominates against Electric but is vulnerable to Thermal.
Electric: Outperforms Thermal but is weak against Chemical.
Antimatter: Neither advantageous nor disadvantageous against any affinity.
Affinities become particularly crucial in the late game, during more challenging game modes, especially when dealing with foes of varying affinities. Antimatter, with its neutral characteristics, may prove beneficial in situations where the enemy affinity is unknown, such as on your arena defense team.
A unit with an affinity advantage over its target will deal 25% increased damage and have 25% increased hacking. A unit with an affinity disadvantage over its target will deal 25% decreased damage and have 25% decreased Hacking. Their critical strike rate is decreased by 25% and cannot exceed 75%. Any effects that do not require hacking to be applied will not be applied with an affinity disadvantage.