Recently added in the Alpha 9 release, randomly generated worlds allow the player a new play experience every time they open up the game. This means every server will have a different dynamic based on their layout of the world.

The game is a mix between a voxel world and full polygon models for buildings, making for a versatile survival based world that brings exploration and creation to the zombie survival genre.

Structural integrity is a real thing in 7 Days To Die. That means there cannot be unsupported floating blocks. The player can set up traps to take out hordes of zombies with a falling building.

Weapons will break and crumble but can also be forged to be awesome, and food will spoil so the player must cook and maintain supplies.

As the player makes progress in the game by interacting with the environment, killing zombies or building things, they are rewarded with skill points that can be used to unlock new skills such as combat strength, higher stamina or new crafting options.
But even though the skill system can seemingly make the game easier, the severity and size of the zombie hordes will keep increasing with the time spent in game and the progress made by the player, keeping them on the edge and making them feel a constant pressure that an attack may come at any time and that they should be prepared.