In Haze, soldiers make use of 'Nectar'. Mantel uses this drug to control the minds of its soldiers. When administered, Nectar can control what a soldier sees, among other things, similar to the effects of a hallucinogenic drug. Nectar drowns out images of death and destruction (for instance, bodies will vanish). Nectar also reduces recoil, and allows the player to zoom in further while scoped. An overdose of Nectar is dangerous, with loss of mental control and death being possible side effects. Nectar also enhances the soldiers' fighting capabilities, allowing them to run faster and jump higher. They also receive a boost in reaction time. A Mantel soldier experiencing an overdose is shown by a change in their armor, changing in color from yellow to red.
Rebel soldiers may go into a "Play Dead" state just before they are killed, allowing them to regenerate health and disappear from the Mantel soldiers' sight, since they can't see dead people while on Nectar. In addition, they exploit Mantel's dependence on Nectar by attacking the Nectar injector, extracting Nectar to use on throwing knives from dead Mantel troopers, and using the injector to create Nectar grenades. These Nectar-enhanced weapons will cause a Mantel trooper to overdose on Nectar, as will attacking the Nectar injector. Later in the game players also encounter special forces and overdosed soldiers that cannot be affected by Nectar-based weaponry. They can also steal a Mantel trooper's gun, dodge, and bury grenades in the ground as mines.