You have longer to wait and hide from the things that go bump in the night, but you also have more time to improve yourself.
This means you'll be seeing blue rarity melee weapons more common. Decreased chance of finding higher quality tier weapons compared to Normal mode, in order to compensate the chance of finding gold-tier weapons.A new melee weapon rarity is available to be found on Hard mode, you have 1/1000 chance of finding gold-tier weapons from Hard chests or Police Vans.There is a very small chance to obtain gold-tier weapons from chests with a Hard lock-picking difficulty or higher, from the back of police vans, from merchants and from Demolishers.Merchants at random encounters may still sell crafting supplies. Merchants at safehouses no longer sell firearm ammunition and crafting supplies.Entering the inventory no longer pauses the game.Rais's Men now appear near Airdrops sooner.Your health and energy regenerate at a much slower rate.Supplies are much more scarce so you will have to spend more time searching for needed supplies.Your flashlight now dims over time and shuts down on its own and has to be turned back on.Survivor Sense now only highlights dropped weapons and Volatiles during the night.This also include damage over time effect you receive from monsters as well.
Enemies now deal more damage and get a damage resist boost, meaning you will die more quickly and enemies have more chances to end you.Special zombies now no longer appear on your mini-map.Using medkits now heals over time instead of healing instantly.Crane now has less stamina requiring you to rest more often in order to run and attack.