|"Is that damage?"|
"It looks like damage."
|"Seems [Mother] has intercepted a transmission of unknown origin."
The Yautja Honor Code is a set of rules that govern day-to-day interactions of Yautja as well as the Hunt. It details under what circumstances a hunter may kill a creature of another species and under what circumstances they may not. The code is strict, and to break it - purposefully, accidentally, or even unwillingly - is a near irredeemable offense in many situations. Only very high ranked seasoned warriors, such as Scarface, or very low ranked novices, such as Young Blood and Un-Blooded Yautja, are permitted any leeway as far as the code is concerned.
All hunters are expected to hunt and kill while adhering to the code and traditions. If they breach the code Yautja are expected to submit themselves for punishment honorably, failure to do so marks a Yautja a Bad Blood. In either case, he is then excommunicated altogether from society and Bad Bloods are considered fair game for the remaining honorable hunters. Some Predators are specifically tasked with hunting down code-breakers that flee from punishment or hide their failures, called Enforcers or Arbitrators.
It is not entirely impossible for a Yautja that has in some way broken the code to regain their honor and rejoin society. Such opportunities are rare and limited to very specific circumstances as seen with Scarface. In order to even be offered the chance at redemption, the Yautja in question must have acknowledged their breach of code and willingly accepted the punishment for that violation. In the case that they are offered a chance to redeem themselves they are assigned a task that must be completed or the Yautja must die attempting to complete it.
- Hunting Worthy Game: When hunting, the hunter must be sure that his prey is considered game and lawful to kill. Sometimes the hunter will equal the odds (not using a Plasmacaster or some similar ranged weapon). Worthy game must fill the following criteria: Can defend itself and/or is able to kill the hunter himself, of age (killing children and the elderly is considered the height of bad manners), not linked to other lives (so that removing the prey will not doom another, e.g. pregnant women), and not weakened by diseases.
- Failing in the Hunt: Should the hunter fail in one's quest he usually takes his own life, preferring to die in honor than to live in shame. However, some cowards prefer to live in obscurity rather than die. This is considered to be dishonorable and suicide is then "assisted" by an Enforcer.
- Claiming the Kill of Another Hunter: To take the Trophy of another Yautja, living or dead, is considered to be a great insult. For example, two Un-Blooded go on their first Hunt: one Yautja takes on a Black Death and both are mortally wounded. While the wounded hunter is dying, the other hunter conveniently finishes off the prey and claims the kill as his own, abandoning the wounded Yautja. This is a crime paid for with abandonment by the clan, marooning the hunter on that world with no equipment whatsoever, this includes the loss of both weapons and armor.
- Murder of Another Yautja: To kill another Yautja intentionally. This excludes self-defense and killing a foe in a wrestling match to settle a dispute (see below). Murder is the worst crime.
- Never harm the innocent: Those who have done no harm should have no harm done to them. (It can be inferred that this rule must pertain only to harming other Yautja in their society since they hunt and kill members of many species one could call "innocent". It can also be inferred that Bad Blood Predators would ignore this rule either in part or in whole.)
- Hunting for Food: When hunting for food, take only the weak. This is to purify the species' line.
- Wounded Game: When coming upon game wounded by another hunter, and the prey is dying without sport, show honor to another's kill. If the game still shows sport, it is to be a joint trophy.
- Joining Another Hunt: Do not join another's Hunt, or Hunt in their territory, without their permission. All trophies taken in this manner are stolen trophies and shall be dealt with by the rightful owner.
- Mercy: Those who defeat you in a fair Hunt, or who are the victors in a deadlier hunt (such as a battle with the Xenomorph Queen), and show you mercy are to be considered our equals. You must either kill both them and yourself or bestow them with a reward.
- Code Violations: Those who break the code are renegades, and no longer considered to be a Yautja. They are to be destroyed when encountered.
- Never Harm the diseased or Offspring: Yautja are known to have a very strict law on the killing of those pregnant with infants and those who are sick. Usually, when they hunt and encounter both, the Yautja is to let them live. The only exception to the rule is if any ill prey poses a threat. An example of such a thing would be when Charles Bishop Weyland set fire to the Predator known as Scar, causing the latter to retaliate and kill him. Although that applies to the ill, Yautja are to never kill those who are pregnant even if they pose a threat. One example of this is when the Yautja known as the City Hunter encountered Leona Cantrell, and learned that she was with a child. Although he didn't kill her, she did go into shock, probably because of the mere sight of the hunter.
- When in a duel with an enemy, you must reveal yourself: In the novelization of AVP, Lex Woods was about to be killed by a cloaked Predator, but before it prepared to deliver the final blow, it de-activated its cloak. According to the book, it is "hunting ethic" to reveal yourself to your enemy at the climax of a fight. However, the movie ignored this part, and showed the still-cloaked Predator attempt to kill her.
- Weapons of Warfare: Weapons of Warfare like the Blazer and Electroshock Missile Battery are strictly forbidden in hunts or even by use of non-Military Caste Hunters. They are considered too destructive to constitute a hunting weapon.