The Con is an innovative 3D fighting game based on an underworld where illegal fighting tournaments exist and high-stakes gambling takes center stage. During gameplay, players can train their fighter to fight solo or in a team of three in Story Mode where their ability to build up a team and implementing match-up strategy plays a huge role. Throughout gameplay, players can learn re-programmable fighting combinations based on five different brawling disciplines—Boxing, Wrestling, Kick Boxing, Tae Kwon Do and Jeet Kune Do. These five brawling disciplines are always on default character, but the player's custom character can choose any brawling disciplines. All brawling disciplines have moves combinations that can be acted as combo, which can be updated depending on the moves a player puts in a combo.
There are three modes: arcade, time-attack and survival. In this mode, there are eleven stages. The first nine are random, and the final two are always the same: Hardcase, a supposedly disgraced man as he wears a cloth which covers his mouth and has scars on his body; and Mask, a man whose fighting style is dependent on the player; if the player is a street boxer, he is a street boxer too, etc.