Zombie Outbreak by Kyle

Necroflux, a new highly contagious virus, has become a worldwide pandemic, eradicating the human race. You are the only survivor left, alongside the ceaseless onslaught of infected. Can you survive in this chaotic world? Will your defenses be strong enough to stop the oncoming horde?

The zombies have become smarter. They're now attracted to light sources, noise, and most importantly - players. Sunlight no longer affects them, and they will stop at nothing to reach you!

Here's a more detailed explanation of what the zombies are capable of:
Mining for blocks will alert other zombies of your position
Zombies can see exposed light sources from very far away and will come to investigate if they have a line of sight
More zombies spawn in groups at night, causing random invasions
Mobs will gather up together and wander the terrain in large groups randomly
Zombies are given a small speed buff to add more unpredictableness

Oh, and... beware the blood moons.