NPCs that remember what you do and react over time.
How it would work:
• If you help an NPC → they become friendly later
• If you attack them → they run, call backup, or seek revenge
• NPCs form groups, factions, and rivalries
• They build bases and defend them
• You can start wars between factions
Why it would be awesome
• Makes the sandbox feel alive
• Creates endless emergent gameplay
• Works great with multiplayer chaos
Example:
• You give weapons to one faction
• They attack another faction
• A full-scale AI war starts without you doing anything