Shoot with one character, slash with the other, switch between them to keep health and ammo high.
Defiance & Mr. Good Looking is a retro-inspired FPS where you choose two characters to play. Switching between them is the way to keep them alive with health and ammo, as by destroying enemies with one character the other will recover those resources.
Each level has two soundtracks, changing characters the music will also change. Each character has their own arsenal of four weapons and all have secondary fire, these weapons are spread across the levels, often hidden somewhere.
Your enemies are adaptable, having parts that can be broken or destroyed to change their behavior, making your opponents a greater or lesser threat.