Betrayal
Broken Pedestal
Deceptive Disciple
Evil Former Friend
Sixth Ranger Traitor
Love-Interest Traitor
Et Tu, Brute?
Treacherous Quest Giver
Treacherous Advisor
Oathbreakers
False Friend
Turncoat/Change Sides
Double Agent/(Fake?)Defector
Cavalry Betrayal or Refusal
Using you all Along
Wrong Side all Along
Evil all Along
Stealing the Credit
Unwilling Sacrificed
Uriah Gambit
Usurpation/Overthrow
Bodyguard Betrayal
Lies and Secrets
Wolf in Sheep's Clothing
Handed Over to Enemy
Regretful Traitor
Rebel Actions
Lured into a Trap
Parental Betrayal/Betrayal by Offspring
Conspiration against Authority
Mistreatment-Induced Betrayal
Hidden Real Villain Reveal
Rewarded as a Traitor Deserves
Locked Up and Left Behind
To Steal Something that is Yours.
Cheating
Aid someone you consider an Enemy in any way (to hide? To steal? to escape? free them? working together?), even if its not against you.
Begin in a relationship with an certain person important to another character (ex? enemy? love interrest? family member?)
Illegitimization/Disownation (of children or even spouses cast aside or even locked up)
Hide the True Objetives of a Mission/Travel/Deal/Plan.
Abandon (Parental? Friends? Romantic Partner? After making a Mistake or Failure? Absence?)
In the middle of a bad thing like sickness? After you lost your usefulness? Put your into a boarding school, asylum or care home and never visits? Left and didn't take you? Abandoned in island with no way to escape or a bad path? (Kinda like in Helcaraxe?)
Turns Against (their Faction? Their Family? their Leader? A member? Encouraged by a specific person?)
Victim Blaming (or blaming a person when it not her/his fault, like failing in stopping a kidnapped, death or theft. For a mother's death in childbirt, or blaming the mistress, not the cheater, blaming your child for your partner actions or resenting a fellow victim)
Refusing to believe the victim is telling the truth.
The Farmer and the Viper/Ungratefulness (Betray after they Help/Save you? Refuse to aid after everything you did and sacrifice for them? Don't valorize you enough?).
Pawn for Betrayal, your group uses you to betray another group/person (that with are friends with). But you didn't knew.
Inaction/Neutrality. (Cowardice? Refusal to Save? To Rebel? To Protect? To Punish? To get Revenge? To Fight Back? To Stop? Or denied you the right to take said action?)
Subordinade betrayed the Allies, when a rebel inside the group betray their allies without the Leader's aproval.
Les Collaborateurs: Join the Oppressors/Usurpers/Conquerers (or serve/work for them).
Traitor of the Folk or Race/Category Traitor, maybe can be related to the '•' above or a Hunter of His Own Kind or a Boomerang Bigot (Inner-Prejudice? Mixed Heritage? Hidden? Adopted? Unaware? Or marrying someone of a 'lesser' kin can be considered 'treason'. Depends which the Folk in question is the considered superior/inferior, or can be more Grey)
Tricked into Accepting Power/Position
Considered a Traitor (and hunted/imprisioned for it?) without the proper explainations or reasons.
Left Behind in the Middle of a Battlefield, Danger or Problem. Or didn't assured their Safety.
A character does shit and runs away, leaving their friends/family behind to suffer the consequences (or stigma) of being associated with them.
A character fucks up/involves himself in some mess and drags their loved ones unwiling in the conflict or put a target on their back.
Depending on which actions, you will be forced to defend or answer for them.
The character lead/drive them to ruin, either for being a awful leader/family head or, dunno, spending their wealth in gambling?
A Good Thing with Second Intentions (Help? Gift? Invitation? Adoption? Marriage? Friendship? Saved? Alliance? Hug?). Even if they have good intentions, like befriending you to guide/protect you, you still can feel cheated and used.
The Mole/Infiltrator/Spy for the Enemy/False Friend (what they did ? Steal? Killed someone? Broke an protective barrier? Let someone in? Free a monster? Told information? Working with a Outsider or Insider Enemy? Help the enemy prisioner escape? If they are a Mole in Change than its a clusterfuck and half)
Not taking your side in the conflict. They forgive and stay with the person who wronged you (both of you?) or take their side, befriend or ally with said person, even help in hurting you or save them. Assist in the cover up. Or even giving a false testimony.
Doing anything Behind their Back (something explicit forbidden?) or in their Absence. Even going as far as sending you away or distracting you.
Villains can be betrayed (the Traitor can become a Ally or another independant Villain)
Telling a Information that is not yours (plans? existence? location? heritage?).
One character is revealed to be involved in an bad thing of sorts (kidnapping, revenge experimentation, deal, test, accident, memory lost, assassination attempt, mission, a death...), can be indirectly using a third party for the action. Against you? Someone you love? A friend doing this against a stranger you don't know still can cause anger.
Use a character (friend? subordinade?) as bait, decoy, scapegoat, proxy, cover or distraction without telling them or asking permission to do so.
The death of a loved one (friend? family? mentor? lover? child?) at the hands of another.
A Mistaken for Betrayal situation where one character does something bad or cruel to his friends (attack, locks up, stab, steal, pretends to be a traitor, kidnaps) for a secret good reason. Or the character thinks they got betrayed due manipulation or misunderstanding.
A character discover a Conspiracy/Mole/Invasor, stops the Villain, is blamed and dies a traitor. (But his action was crucial to the future defeat)
Revenge
Karma
The Resenter
Avenging the Villain
Accepted Revenge
Punishment/Compensation
Gaia's Vengeance
Disproportionate Retribution
Revenge Through Corruption
Accuser of the Brethren
Attack on One Is an Attack on All
An Eye for a Eye
The Dog Bites Back
Do with Him as You Will
Then Let Me Be Evil
Misplaced/By Proxy (to a association? Or just a random member of a enemy group?)
Misplaced Blame
Roaring Rampage of Revenge
Bolt of Divine Retribution
Rejected Apology (can relate to Revenge)
Revenge as more of a reaction to something bad done to you: like...a character gets kidnapped and their Faction attacks, or maybe even kidnaps one from the other side, until the enemy agrees to return their friend. Or take all their enemy's gold because are responsable for burning down a village under your rule.
A person mistakenly takes revenge in the name of another, said another did not want that because he still loved the target and didn't truly wanted revenge
For who? Parents? Family? Mentor? Sister or Brother? Friend? Lover or Offpring? Hometown? What happened?
Victim Blaming