Killzone: Mercenary is a first-person shooter video game and the second handheld game in the Killzone series. For the first time in a Killzone campaign players can fight alongside Helghast forces as well as ISA specialists carrying out missions that regular soldiers cannot. As a mercenary players are free to decide which tactics and load outs they will use to fulfill their contract; employers will reward players with money if successfully completed. The game utilizes the PS Vita's touchscreen and rear touch panel.