There are no difficulty settings to choose from with this mod.
Changes to actor health system, item effects, economy and damage system for very high difficulty.
No gifts in your stash after the quest's "friend of stalkers" & "monsterhunter".
No more "killing zombies to easily find loads of weapons and ammo".
Zombified stalkers are mindless wanderers that attack everything and are killed effectively only with headshots.
Very little food and good drinks found in The Zone making them more valuable.
3GB RAM enabled for system engine (prevents crashes on lower end pc's).
Your flashlight does not illuminate your weapon any more (only when reloading and sprinting) which makes it easier for your eyes to focus on the environment during darkness.
This effect varies depending on the caliber fired.
New cool screen effects when firing a weapon (resembling recoil shock/shake effects).
Option for first person camera and third person camera with a single button.
Corpses and dead animals can be dragged ("Shift" + "Use" key).
Time scale is scripted to 3:1 (3 times faster than realtime).
English subtitles during VIP NPC dialogs.
Your entry to The Zone is at 6 AM (morning).
Endurance and maximum carrying weight varies and is based on your choice of character.
The maximum weigth you can carry is lowered but you run slightly faster now when not overencumbered.
New entry (starting) gear based on your choice of USS specialization.
Actor feels more alive with various tweaks of sound, movement and general interaction during firefights.
Actor belong to "Ukrainian Special Services (USS)" and not "Free Stalkers".
NPCs turn to Zombies if not safely hidden during emmissions.