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Impossible Left 4 Dead

This mod makes your left 4 dead harder in coop, realism and survival.
Endless zombies and special infected for you to fight. They just keep coming!

Used cvars that makes the mod fun xdd :
chainsaw_attack_cone 120
chainsaw_attack_distance 20
chainsaw_attack_force 800
chainsaw_damage 500
chainsaw_hit_interval 0.05
grenadelauncher_damage 8000
grenadelauncher_radius_kill 360
grenadelauncher_radius_stumble 500
pain_pills_health_threshold 5000
pain_pills_health_value 5000
pain_pills_decay_rate 2
adrenaline_duration 45
adrenaline_health_buffer 50
adrenaline_run_speed 400
r_flashlightfov 100
survivor_friendly_fire_factor_expert 4
survivor_friendly_fire_factor_hard 1
survivor_friendly_fire_factor_normal 0.5
survivor_friendly_fire_factor_easy 0.1
survivor_revive_health 200
first_aid_kit_use_duration 1
first_aid_heal_percent 10
first_aid_kit_max_heal 250
survivor_incapacitated_reload_multiplier 0.5
survivor_incap_decay_rate 0
survivor_incap_hopeless_decay_rate 154
survivor_max_incapacitated_count 10
survivor_revive_duration 1
survivor_allow_crawling 1
survivor_crawl_speed 50
rescue_distance 1
rescue_min_dead_time 1
survivor_limit 5
z_fallen_max_count 3
z_speed 420
z_common_limit 40
z_mob_spawn_finale_size 30
z_mob_spawn_max_size 15
z_mob_spawn_min_size 10
z_mob_spawn_max_interval_easy 30
z_mob_spawn_max_interval_normal 24
z_mob_spawn_max_interval_hard 24
z_mob_spawn_max_interval_expert 18
z_mob_spawn_min_interval_easy 10
z_mob_spawn_min_interval_normal 10
z_mob_spawn_min_interval_hard 10
z_mob_spawn_min_interval_expert 10
z_mega_mob_size 40
z_mega_mob_spawn_max_interval 42
z_mega_mob_spawn_min_interval 36
z_wandering_density 0.06
z_fallen_kill_suppress_time 1
z_vomit_interval 8
z_charger_pound_dmg 60
z_charge_max_force 1800
z_charge_duration 10
z_charge_start_speed 500
z_charge_prop_damage 1000
z_charge_max_damage 1000
z_charge_impact_radius 250
z_witch_damage 30
z_witch_relax_rate 0.25
z_witch_anger_rate 0.5
z_witch_damage_per_kill_hit 15
z_spit_interval 12
z_tank_speed 400
z_tank_throw_force 1200
tank_swing_interval 0.3
z_tank_attack_interval 0.25
tank_swing_miss_interval 0.3
z_tank_rock_radius 300
z_spitter_speed 460
tongue_range 1500
tongue_fly_speed 1500
tongue_choke_damage_interval 0.25
tongue_victim_max_speed 175
z_jockey_ride_damage_interval 0.25
z_jockey_ride_damage_delay 0
tongue_hit_delay 2
tongue_miss_delay 2
z_leap_interval_post_incap 2
z_leap_interval_post_ride 2
z_charge_interval 0.1
z_charge_max_speed 500
z_pounce_damage_interval 0.125
z_gun_swing_interval 0.5
z_cough_cloud_expire 3
z_throttle_hit_interval_easy 0
z_throttle_hit_interval_normal 0
z_throttle_hit_interval_hard 0
z_throttle_hit_interval_expert 0
z_hit_incap_factor_easy 0.1
z_hit_incap_factor_normal 0.5
z_hit_incap_factor_hard 1.0
z_hit_incap_factor_expert 4.0
z_hit_from_behind_factor 1
z_attack_interval 0.5
z_survivor_respawn_health 200
z_gun_swing_coop_max_penalty 1000
z_gun_swing_coop_min_penalty 1000
z_non_head_damage_factor_multiplier 1.0
z_head_damage_causes_wounds 1
z_use_next_difficulty_damage_factor 1
z_friendly_fire_forgiveness 0
sb_all_bot_game 1
sb_allow_shoot_through_survivors 1
sb_vomit_blind_time 0
director_per_map_weapon_upgrade_chance 1
survivor_damage_speed_factor 1