During combat, sometimes a stronger foe may come around and attempt to kill both the Yautja and the Yautjas original prey. In this scenario, the Yautja and its prey may form a temporary truce where neither attack each other (even in the scenario of stray bullets or explosives) and instead focus fire on the new target that's attempting to kill them both.
For example, when a squadron of Marines and a Yautja are fighting and are put into combat with a horde of Xenomorphs they will form a temporary truce where both parties work together to kill the Xenomorphs. After the Xenomorphs are slain this truce remains for an additional 90 seconds before both parties go back to attempting to kill one another.
Whilst players cant form these truces with Yautja in combat, they naturally can gain these Truces through high honour with the Yautjas clan / tribe.
This mechanic typically will only ever occur when both the AvP : Predator and AvP : Humans module are put together.