SWAT 3: Close Quarters Battle (also known as SWAT3 or SWAT3:CQB) is a tactical squad-based first-person shooter, developed by Sierra Northwest and published by Sierra Entertainment for Windows-based PCs. It is the seventh installment of the long-running Police Quest and SWAT series.As the first first-person shooter of the Police Quest/SWAT series, SWAT3 received a new game engine with cell and portal technologies for simulation of environments and advanced AI and ballistics.