(version 2.1):
-zombies: move faster, have more health, but spawn less.
-smaller hordes.
-changes in weapon slots.
-decreased melee damage.
-doors behave more realistic.
-fixed the bug for survivor bots trying to take pistols.
-fixed the tank bug.
-zombie corpses behave more realistic.
-the hunting rifle's clip has been increased to 10 and its reserve ammo to 30.

(version 2.0):
-now includes the "I Am Legend" SOLO mutation (v1.1) of this mod!
-new indexation for weapons. Difference between light/small weapons and heavy/big weapons.
-doors can be broken easier by infected.

(version 1.8):
-fixed a bug where zombies appear neon blue or green on the original L4D maps.
-reduced the Tank and Witch health to compensate for the lower weapon damages in version 1.7.
-increased shotgun effective range.

(version 1.7):
-upon requests, all bullet damage has been re-calculated. The guns now deal less damage, but still a realistic amount. I hope you're happy with it 'cause it's been a lot of work.
-to balance the extremely low damage that the normal pistols deal, they are now lighter and you can run faster with them than with other weapons.
-pistols have been set as primary weapons. Their ammo can now be refilled.
-zombie movement speed has been decreased but they now hit much harder.
-the "mega mob" has been increased from 50 to 200. Get ready for massacres.
-the normal mob is now 5-50 (was 5-100).
-the progress bar (which is shown when filling generators with gas cans, etc.) has now been disabled too.
-increased the grenade launcher blast radius.
-shotgun accuracy has been increased and their damage has been decreased.
-non-headshots against zombies deal 75% damage instead of 100.

RECENT CHANGES (version 1.6):
-some special infected return, but no chargers or spitters. They have a very slow spawn rate and have low health.
-an exploding boomer can distract pouncing zombies (hunters, jockeys, smokers) and they will release the survivor.
-doors are no longer easily destroyed by zombies or weapons, but will blow out when hit by explosives.

RECENT CHANGES (version 1.5):
-the M60, grenade launcher, chainsaw and ammo upgrades are now "carrying weapons" (like gas cans, propane tanks, etc) you can pick them up and use them and they won't replace your weapon or first aid kit!
-the amount of zombies coming from hordes is now completely random and can vary from 5 to 100 zombies

Fixed a small error.

RECENT CHANGES (version 1.4):
-pistols now have limited ammo! They get 4 extra mags: max ammo for pistol is 60 and Magnum has 32. Cannot be refilled at ammo piles.
-the pump shotguns had 27 instead of 32 shells, this has been fixed.
-the autoshotguns got 5 extra shells, also having 32 max ammo.
-upon request, the tank and witch health has been decreased and the hunters have been removed!
-survivor bots can now lead and use melee weapons better.
-zombies now hit much harder, however the amount of zombies has been decreased. This should make for a real challenge.