Visit

 https://coros.us/mods/zombieawareness

for a much better showcase of the mod with images and videos

1.16.5 / 1.17.1 / 1.18.1:

- Blood scents: You spill blood if you get hurt, and if low health you bleed out once in a while
- Sound sources: causing these will alert other monsters of your position, they are:

-- Mining for blocks, Placing blocks, Explosions, Bows and Crossbows, Eating, Doors, Gates, Notes, Records, Buttons, Levers, Pressure Plates, Tripwires, Chests, Barrels, Pistons, Other zombies

- Light sources: Zombies can see exposed light sources from super far away, and will come to investigate if they have line of sight
- Random wandering hordes on surface (default off): Mobs will gather up together and wander the terrain in large groups randomly

- Default enhanced mobs (configurable): "minecraft:zombie", "minecraft:husk", "minecraft:creeper", "minecraft:skeleton", "minecraft:stray", "minecraft:witch", "minecraft:zombie_villager" 

- Radioactive glowing blood, definitely not a lighting bug for now.

1.12:

- Blood scents: You spill blood if you get hurt, and if low health you bleed out once in a while
- Sound sources: Mining for blocks will alert other zombies of your position
- Light sources: Zombies can see exposed light sources from super far away, and will come to investigate if they have line of sight
- Night surface spawning: More zombies spawn in groups at night, causes random invasions
- Random wandering hordes on surface (default off): Mobs will gather up together and wander the terrain in large groups randomly
- Randomly faster zombies: Zombies are given a small buff in speed to add more unpredictableness

Requires CoroUtil

You may use the mod in any modpack you like.

Features:

Blood Senses:

You spill blood if you get hurt, shown on the ground, and if low health you bleed out once in a while, and they will sense it and track you down

Sound Senses:

Causing these will alert other monsters of your position, they are:

Mining for blocks, Placing blocks, Explosions, Bows and Crossbows, Eating, Doors, Gates, Notes, Records, Buttons, Levers, Pressure Plates, Tripwires, Chests, Barrels, Pistons, Other zombies, and more!:

The louder the sound the more impact it has on them hearing it:

Light Sources:

Monsters can see exposed light sources from super far away, and will come to investigate if they have line of sight

Config:

Choose what monsters you want enhanced

by default it enables it for: "minecraft:zombie", "minecraft:husk", "minecraft:creeper", "minecraft:skeleton", "minecraft:stray", "minecraft:witch", "minecraft:zombie_villager"

Tries to support modded mobs, After running your modpack once, check out MobLists.toml -> enhanceableMobs to see a list of modded mobs that might work!

Misc:

Use pisons or tnt to attract zombies to areas, usefull for distractions to help you get away. They always go for the louder noise.

Optional random wandering hordes on surface (default off): Mobs will gather up together and wander the terrain in large groups randomly

Requires CoroUtil

Use in any modpack you want!