The Hunger SMP is a semi-anarchy survival server where griefing, raiding, theft, and full-on chaos are all part of the game. There is no hand-holding here, just a world where you can make allies, betray them, build something huge, or tear it all down yourself.
It keeps the rough survival feel, but throws in custom trims, terrain generation, unique structures, and a few other modded touches so it does not feel like plain vanilla. The server is still close enough to survival that the world and the players matter most, but there is always something new to run into while you play.
The idea is simple: survive, fight, make deals, and keep your head down if you need to. The server also gets regular updates and community events, so there is usually something going on even when the world is in full chaos.