I would like that apart from recruiting survivors for our base, there are hostile survivors who want to attack us, which we would find when exploring a building, and they could try to negotiate so that they do not attack us, we could attack us, they could simply attack us and so on.
If we decide to fight them and win, we can keep their loot (weapons, medicines, rare resources, etc.).
If we lose, there will be two possible consequences, determined by chance or by a probability system:
Partial or Total Theft: Hostile NPCs can loot part or all of the player's inventory.
Permanent or Temporary Death: There is a small chance that the NPCs will kill the player, and we will lose them forever
Not all hostile survivors are the same: some attack directly, while others can negotiate or threaten the player depending on their progress and equipment.
This adds variety and depth to interactions.
This would make us explore more carefully, as there may be some survivors hiding in the building who are not friendly and intend not to share their help, therefore we would need to run away from them or fight with them, although this may attract zombies.