Call of Duty: Underworld

Call of Duty: Underworld is installment to the franchise which centralises an Australian criminal gang illegally leaving Australia and going to Sierra Leone while it's in turmoil to avenge the death of their leader.

Plot
The player takes control Samuel Lane, an enforcer in the gang known as Coloured. Their leader Javier is killed by Cameroonian club thinking he is a member of the Sierra Leonean Military. The club known as the Unified African Club with the sole goal to unify Africa as a whole Nation instead of a continent of different Nations, while in the United States and Australia they have been listed as a Terrorist Organization, Cameroon and most of Africa don't regard them as such and refuse to list them as terrorist, unless they do something that is an act of terrorism in Africa. The Sierra Leone's Representative to the UN and President agreed that America and Australia could intervene in the UAC War. In 2018, they destroy several American Military Jets that are flying over Cameroon while heading towards Nigerian during the South African Tsunami Crisis the for violating No Fly Zone Foreign Military jets, and confiscate them under orders of the government. Although the Military didn't believe nor took not into the restriction and 12 out of 24 F-22s were shot down in response, the F-22s attack the UAC's base of operation, while they continue to knock them out the sky. The pilots were than arrested by the UAC and imprisoned with their campus. The Cameroonian Government condemned the pilots actions and told them they are in prison for the rest of life. The United States didn't believe or acknowledge the UAC's claims or being group legally allowed to stop aircraft and sent the SEALs in to "rescue" the soldiers. 3 Australian jets were destroyed for violating the restriction and both American and Australia tried to contact the Cameroonian Government but were rejected.

In 2024, the Cameroonian Government enacted the American-Australian Registration Act, where Americans and Australians must oblige to all searches or register to government while going through Border Security, any person who denies to follow the Act, will be rejected entry to Cameroon. By 2032, The UAC went on a manhunt for an Australian spy whom entered the country illegally and was arrested on Espionage, Murder of a UAC member, Fraud, Refusing to register and illegal entry into their country, which lead them to Sierra Leone. Sierra Leone refused to head over their prisoner and Cameroon responded by sending in the UAC and tried to take him by sneaking him out. But due to Cameroon shutting the rest of the world out, the UAC is still regarded as a terrorist organization and many of their members were killed by the Sierra Leonean Government. In 2035, the UAC invade the office of the Cameroonian Government and kill the President, Prime Minister and many of members of the Government for disallowing them to avenge the death of fallen friends. Cameroon and the rest of Africa finally recognised the group as terrorists and sent out apologies to the other countries. The UAC then start to target other African leaders planning to make their leader the sole ruler of Africa.

In 2039, the leader of the Coloured gang is killed by a member of the UAC.