The battleground of a fierce battle with the smell of gunpowder In the 21st century, there are terrible terrorist incidents around the world. Countless gunmen carrying guns and grenades broke into the Korean consulate in the Middle East. Shortly after the incident occurred, six special mercenaries were dispatched to protect the consulate led by a Bravo team, each secretly operating in the Middle East, from Gaie Arms Fabric, (GAF) and Ariel Gunner Industry (AGI). They set out on an immediate rescue operation to save the remaining people. Gaie Arms Fabric (GAF) and Ariel Gunner Industry (AGI) are faced off against the terrorists of the two private mercenary companies. The 21st century battle provides realistic missions such as operations, taking place on various locations that show realistic modern infantry warfare in the context of the era. Through these missions, gamers can vividly experience the thrilling feeling as if they were given a mission and participate in the battle directly in the real battlefield. Killstreak is a first-person shooting online PVP game. There are three game modes of battle. 1. Free for all All users are your enemies , there are no teams. The user who kills the most users during the round time wins. 2. Team deathmatch Join a team and defeat your opponents’s team. The team who kills the most users during the round time wins. 3. Capture The Flag Capture the flag of the opposing faction while killing the enemy.