(All information is taken from Nomad difficulty with normal zombie spawning)
Day 7 is more or less the time that decides if the player's defenses are solid or not. On every 7th Day multiple, a massive horde of Zombies and Zombie Dogs travels through the area the player is currently in. This horde could consist of:
- at least 10 Zombie Dogs
- 2 or more Feral Zombies
- 6 or 7 Infected Police Officers
- 4 or 5 Hornets
- at least 30 to 50 normal zombies (Plagued Nurses, Nude Walkers, Crawler Zombies, ect.) Regardless of what biome the player is in, Burn Victims will also spawn with the horde. The horde normally shows up between 12:00 and 15:00. If engaged, the zombie horde will render plenty of Gun Parts and Ammunition, possibly even Guns themselves, and other miscellaneous loot.
On every 7th Night multiple, a smaller but still large horde of zombies will spawn. This horde of zombies will be able to detect the player through walls and when underground, no noise is being made and no odorous foods are being carried This horde will contain only normal zombies and Zombie Dogs. (except if the player is currently in a Wasteland biome) Even though they are only regular zombies, Night makes them exponentially more dangerous, because they can sprint and quickly overtake and surround the player.
Combat and Defenses
With the daytime horde, it is quite tricky, but not impossible to dodge them completely. Zombie Dogs are extremely fast, even in daytime, and can catch you off guard if you happen to be preoccupied with something else. Normally 3 or 4 dogs will attack the player at once, and the others will follow after that, so if there is a dog out in the middle of nowhere running, expect to find a horde following. It is not recommended to hide in a house without heavy defenses and very durable walls if the player has been spotted, because of theInfected Police Officer's corroding vomit, and large amounts of zombies hitting the walls. This could possibly bring the house, and the player, to the ground.
A Shotgun with plenty of Shotgun Shells and good dodging skills will allow the player to take down most of the zombies. A 44 Magnum with plenty of ammunition will also make quick work of the horde. Pipe Bombs are also a big help, because the zombies tend to group up pretty closely. It is recommended that all Zombie Dogs be killed first, because of their speed. After that, Infected Police Officers will most likely be in range, and can be killed and possibly looted. Feral Zombies should normally be avoided and saved to be killed last, because they drop the best loot, and are quite the ammo dump. Hornets are not normally that big of a problem, because they tend to just ignore the fight and not notice the player.
The nighttime horde can be a bit tricky, because the zombies are much more agile and harder to shoot. If a 1 block deep and 2 or 3 block wide "moat" is dug around the player's house and filled with Wood Spikes and Wood Log Spikes, zombies will run into them and essentially kill themselves while trying to attack the player's walls. The zombie horde tends to "trickle" in more then all come at once, so spikes will eventually break and Gore Blocks will build up, allowing zombies to walk right over the player's defenses. Being on the roof with some type of weapon will dispatch plenty of zombies and take a load off any surviving defenses. A one block lip will on the roof also be required to prevent the player from being ambushed by Spider Zombies. A Sniper Rifle is a valuable weapon in this situation, because the player can start to pick off Bloated Walkers before they even reach defenses, because they do more damage and have more health, and will injure the spikes more then the average zombie.
- A 44 Magnum with plenty of 44 Magnum Bullets is one of the best choices for the day or night hordes because of it's 1 shot kill potential anywhere on the body to normal zombies or head to Infected Police Officers.
- A Shotgun or Pump Shotgun is not recommended for use on Infected Police Officers because of their ability to explode if they are approached, killing the player almost instantly.
- Feral Zombies take a lot to kill and hit very hard, but are also slower then other zombies, therefor making them lag behind in the horde.
- Wood Log Spikes do considerably less damage than Wood Spikes, but never break unless hit directly.