Spoilers below…
Vampires, Hearts & Other Dead Things: cancer, death of a parent
Cruel Illusions: Violence, gore, knife use, gun use, death of parent, depictions of both positive and negative experiences relating to foster care, domestic abuse in a character backstory, death of a sibling in a character backstory, assault (nonsexual).
The Revenant Games Duology: Death of a sibling, death of parents, gore and violence, brief torture, the FMC is bitten on the neck without consent (the attack is not done by a love interest and it is not sexual but may still be triggering so please proceed with caution)