All entities which are new or updated in Left 4 Dead 2.

Environment

• env_airstrike_indoors - Adds an airstrike effect for indoors (crumbling ceiling)
• env_airstrike_outdoors - Adds an airstrike effect for outdoors
• env_instructor_hint - Allows creation and control of instructor messages through map logic

Filter

• filter_health - Can filter based on the health of the activator, and wheter they have adrenaline active or not
• filter_melee_damage - Can filter based on melee damage, and the type (all, slash or club)

Function

• func_block_charge - The Charger will not charge through this brush.
• func_instance - An entity for placing an instance of a map file
• func_instance_parms - Controls parameters used in func_instance within an instance
• func_nav_connection_blocker - Blocks nav meshs (on creation) from being connected through it's volume.
• func_playerghostinfected_clip - Blocks ghost infected.
• func_timescale - Adjust the time scale of the server/client through map logic (slow-mo scene at end of Dead Center finale)

Information

• info_ambient_mob_start - Potential starting area for an ambient mob
• info_ambient_mob_end - Potential end area for an ambient mob
• info_ambient_mob - universal ambient mob start/end (use with care)
• info_particle_target - Allows marking areas in the map for particle systems with control points to reference
• info_zombie_border - Zombies will not spawn behind this entity.

Misc

• ambient_music - Can override the Music Director, forcing a custom wav file to play in the music mix layer.
• game_scavenge_progress_display - Allows turning the scavenge score display on/off as well as setting the total items required.
• logic_script - Container for scripts
• player_weapon_strip - removes specific weapon or active weapon
• point_nav_attribute_region - Holds attributes to be applied to regions of nav areas during generation
• prop_mounted_machine_gun - A .50 Cal mounted machine gun.
  Note:Currently L4D2 does not support the prop_minigun, so you will need to replace them with this entity instead when updating your addons.
• sound_mix_layer - Allows setting the levels of a specific sound mix layer.
• trigger_active_weapon_detect - Fires output when touched by a player that has a specific weapon active

Weapon/Upgrade Spawn

• upgrade_spawn - Allows the director to place gun upgrades: laser sights, explosive ammo, and incendiary ammo.
• weapon_adrenaline_spawn - A possible spawnpoint for adrenaline
• weapon_chainsaw_spawn - A possible spawnpoint for chainsaws
• weapon_defibrillator_spawn - A possible spawnpoint for defibrillators
• weapon_grenade_launcher_spawn - A possible spawnpoint for grenade launchers
• weapon_item_spawn - A possible spawnpoint for a random item (first aid kits, pills, adrenaline, bile bombs, defibrillators etc.)
• weapon_melee_spawn - A possible spawnpoint for random melee weapons
• weapon_pistol_magnum_spawn - A possible spawnpoint for magnum pistols
• weapon_rifle_ak47_spawn - A possible spawnpoint for AK-47's
• weapon_rifle_desert_spawn - A possible spawnpoint for combat rifles
• weapon_scavenge_item_spawn - A spawnpoint for a scavenge gas can
• weapon_shotgun_chrome_spawn - A possible spawnpoint for chrome shotguns
• weapon_shotgun_spas_spawn - A possible spawnpoint for combat shotgun
• weapon_smg_silenced_spawn - A possible spawnpoint for silenced submachineguns
• weapon_sniper_military_spawn - A possible spawnpoint for military sniper rifles
• weapon_spawn - A possible spawnpoint for random weapons
• weapon_upgradepack_explosive_spawn - A possible spawnpoint for explosive ammo
• weapon_upgradepack_incendiary_spawn - A possible spawnpoint for incendiary ammo
• weapon_vomitjar_spawn - A possible spawnpoint for bile bombs

Updated

Environment

• env_fog_controller - Has new entrys/inputs for settings such as Set2DSkyboxFactorLerpTo (Amount of fog to blend into 2d Skybox to lerp to)
• env_tonemap_controller - Can now set TonemapPercentBrightPixels, and other settings.

Function

• func_elevator - Added input to set max speed dynamically
• func_move_linear - Added ResetPosition/TeleportToTarget
• func_nav_blocker - Added toggle to determine if nav flow should be recomputed or not
• func_orator - Now allows setting the max legal followup distance for automatic responses
• func_precipitation - Added Rain Storm, Bugs, and Smoke
• func_push - Added OnStartTouch output, and input SetMaxSpeed to allow setting the push speed dynamically
• func_rotating - Added SnapToStartPosition

Information

• info_director - Added many outputs to fully customize scavenge games, also includes scripting and journal support.
• info_gamemode - Added additional game modes, added OnNavAnalyze output which is fired only when map is loaded with -navanalyse command line option set
• info_particle_system - Added setting to allow forcing particles to always render infront of everything
• info_survivor_position - Can now be tied to a specific gamemode, and given a specific intro to play

Misc

• Worldspawn - Can now choose time of day (evening, midnight, etc..), music post-fix name (for Music soundscripts to reference), as well as starting music type (Mission Start, Check Point)
• beam_spotlight - Added NoFog spawnflag.
• sky_camera - Added additional options for customizating plane clipping offsets, etc
• filter_activator_infected_class - Added the new special infected
• logic_auto - Added 'OnDemoMapSpawn' output
• postprocess_controller - Can now dynamically alter film grain and vignette strength

Point

• point_hurt - Added additional damage type: "FULLGIB"
• point_spotlight - Added option to set Halo size
• point_viewcontrol_multiplayer - Updated with additional inputs, toggles, and most importantly it now supports 'Target Entity' to easily create simple smooth gliding intro animations without relying on custom model animations.

Prop

• All props now have a 'Lag Compensation' toggle. (Use sparingly!)
• prop_car_alarm - Added ability to enable/disable
• prop_door_rotating - Added 'glow' option
• prop_physics - Added OnHitByTank output, for creating custom events when a prop is punched by the tank.

Trigger

• trigger_finale - Added types selection: "Standard" "Gauntlet" "Custom" "Scavenge", and a property to define max points for scavenge mode.
• trigger_hurt - Added additional damage type: "FULLGIB", and the option to have it 'think' every frame instead of every half second. (Expensive!)