For 80 years, the world is in a total war. Fighting is not only a matter of being alive, it's a manner to make money too. Populations bet on different soldiers in 3 distinct leagues of the TV Show B.O.S, the Bet On Soldier. These champions must kill each others in order to earn prizes and wagers.
You are Nolan Daneworth. Your family was killed by two champions of the BOS. You enter the BOS in order to seek revenge, and you must climb the ladder if you want to meet them on the battlefield.
The gameplay is simple: you have classic missions (destroy a base or infiltrate a bunker etc) and you must fight against 2-4 champions of the BOS during these missions. You earn money by killing soldiers (head shots worth more than simple killing).
With this money, you can buy armors, weapons and upgrades. You can also repair your armor at the different repairing posts. There are no medikit in this game, so this armor is your only one protection, so be careful with it.