the Soldier Longevity Program (SLP) is a highly classified U.S. military initiative focused on extending the lifespan and enhancing the combat capabilities of soldiers. this is achieved through a combination of advanced bioengineering, genetic modification, and cybernetic augmentation. publicly, the program is lauded as a patriotic endeavor. however, beneath the surface, the program is riddled with ethical controversies and dark secrets.

the SLP includes the main project along with two sub-projects, Project Chimera and Project Erebus. however, the most unsettling facet of the SLP comes in the form of its main project: reviving dead soldiers. in 2056, when the virus used in the SLP for the purpose of postmortem reanimation was greenlit, it became apparent that reanimated humans come back... wrong. they attack anyone, friend or foe, and are exceptionally difficult to control.