Modding Effects

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This page documents the various effects in the vanilla game. Modders can apply these effects to their custom content.

This table doesn't fully explain how to use these effects. Please view their items/characters/weapons for usage.

The headings separate the files by their location, but effects can often be applied to things outside of that heading, eg. my effects in res://effects/items/*.gd are applied to characters too.

Item Effects

Despite the heading, these effects can actually be used by characters and weapons too. They're just stored in effects/items.

Effect File (*.gd)	key	text_key	Items	Characters	Misc
effect	Effect key, eg: stat_max_hp / bounce	not specified	many	-	-
alien_eyes_effect	alien_eyes	effect_alien_eyes	Alien Eyes	-	-
burn_chance_effect	burn_chance	effect_burn_chance	Scared Sausage	-	-
class_bonus_effect	effect_weapon_class_bonus	not specified	-	Brawler, Crazy, Doctor, Ghost, Wildling	-
convert_stat_effect	materials	effect_convert_stat_end_of_wave	-	Demon	-
dmg_when_death_effect	dmg_when_death_from_luck	effect_deal_dmg_when_death	Cyberball	-	-
dmg_when_pickup_gold_effect	dmg_when_pickup_gold_from_luck	effect_deal_dmg_when_pickup_gold	Baby Elephant	Lucky	-
gain_stat_for_every_stat_effect	Effect key, eg: stat_max_hp / bounce	many	-	Artificer, Chunky, Generalist, Hunter, Knight, Saver, Speedy	-
gain_stat_for_every_stat_effect	stat_attack_speed	effect_gain_stat_for_every_enemy	Community Support	-	-
gain_stat_for_every_stat_effect	stat_hp_regeneration	effect_gain_stat_for_every_perm_stat	Esty's Couch	-	-
gain_stat_for_every_stat_effect	stat_max_hp	effect_gain_stat_for_every_stat	Padding	-	-
gain_stat_for_every_stat_effect	stat_percent_damage	effect_gain_stat_for_every_perm_stat	Power Generator	-	-
gain_stat_for_every_stat_effect	stat_attack_speed	effect_gain_stat_for_every_stat	Retromations Hoodie	-	-
gain_stat_for_every_stat_effect	stat_engineering	effect_gain_stat_for_every_stat	Strange Book	-	-
healing_effect	effect_heal	not specified	-	-	Fruit, LegendaryBox
hp_cap_effect	hp_cap	effect_hp_cap_at_current_value	Handcuffs	-	-
item_exploding_effect	explode_on_hit	effect_explode_on_hit	-	Bull	-
item_exploding_effect	explode_on_death	effect_explode_on_death	Landmine Rip and Tear	-	-
pacifist_effect	pacifist	effect_pacifist	-	Pacifist	-
projectile_effect	projectiles_on_death	effect_projectiles_on_death	Baby with a Beard	-	-
remove_speed_effect	remove_speed	effect_remove_speed	Ugly Tooth	-	-
replace_effect	double_hp_regen_below_half_health	effect_double_hp_regen_below_half_health	Potion	-	-
replace_effect	minimum_weapons_in_shop	effect_minimum_weapon_in_shop	-	Arms Dealer	-
replace_effect	weapon_slot	effect_no_weapons	-	Bull	-
replace_effect	hp_shop	effect_hp_shop	-	Demon	-
replace_effect	trees_start_wave	not specified	-	Explorer	-
replace_effect	max_melee_weapons	effect_generalist	-	Generalist	-
replace_effect	max_ranged_weapons	[EMPTY]	-	Generalist	-
replace_effect	dodge_cap	effect_dodge_cap	-	Ghost	-
replace_effect	weapon_slot	effect_max_weapons	-	Multitasker	-
replace_effect	can_attack_while_moving	effect_cant_attack_while_moving	-	Soldier	-
replace_effect	double_boss	effect_double_boss	-	-	Danger5
starting_item_effect	starting_item	effect_starting_item	-	Brawler, Crazy, Engineer, Mage, Pacifist, Ranger, Saver, Wildling	-
stat_effect	stat_armor	effect_stat_while_not_moving	Barricade	-	-
stat_effect	stat_dodge	effect_stat_while_not_moving	Chameleon	-	-
stat_effect	gold_on_crit_kill	effect_gold_on_crit_kill	Hunting Trophy	-	-
stat_effect	stat_attack_speed	effect_stat_while_not_moving	Statue	-	-
stat_effect	stat_percent_damage	effect_on_hit	Triangle of Power	-	-
stat_effect	stat_percent_damage	effect_gain_stat_end_of_wave	Vigilante Ring	-	-
stat_effect	stat_percent_damage	effect_stack_stat	Wisdom	-	-
stat_effect	stat_max_hp	effect_gain_stat_end_of_wave	Grind's Magical Leaf	-	-
stat_effect	stat_hp_regeneration	effect_gain_stat_end_of_wave	Grind's Magical Leaf	-	-
stat_effect	stat_lifesteal	effect_gain_stat_end_of_wave	Grind's Magical Leaf	-	-
stat_gains_modification_effect	effect_increase_stat_gains	not specified	-	Many	-
stat_gains_modification_effect	effect_reduce_stat_gains	not specified	-	Many	-
structure_effect	not specified	effect_landmines	Landmines	-	Screwdriver
tier_effect	min_weapon_tier	effect_min_weapon_tier	-	Knight	-
tier_effect	max_weapon_tier	effect_max_weapon_tier	-	Wildling	-
turret_effect	not specified	effect_turret	Turret	-	Wrench
turret_effect	not specified	effect_turret_healing	Healing Turret	-	-
turret_effect	not specified	effect_turret_laser	Laser Turret	-	-
turret_effect	not specified	effect_turret_rocket	Rocket Turret	-	-
turret_effect	not specified	effect_tyler	Tyler (Turret)	-	-
turret_effect	wandering_bot	effect_wandering_bot	Wandering Bot	-	-
turret_flame_effect	not specified	effect_turret_flame	Flame Turret	-	Wrench (Tier2)
unique_weapon_effect	stat_attack_speed	effect_unique_weapon_bonus	Focus	-	-
unique_weapon_effect	stat_attack_speed	effect_unique_weapon_bonus	Spider	-	-
weapon_bonus_effect	???	???	unused	-	-
weapon_gain_effect	???	???	unused		-

Weapon Effects

Like Item Effects above, some of these can be used by items/characters.

Effect File (*.gd)	key	Used By
burning_effect	effect_burning	Flame Turret, Flaming Knuckles, Torch, Flamethrower, Wand
exploding_effect	effect_explode_melee	Plank, Plasma Sledgehammer, Power Fist, Nuclear Launcher, Shredder
gain_stat_every_killed_enemies_effect	effect_gain_stat_every_killed_enemies	Ghost Axe, Ghost Flint, Ghost Scepter
null_effect	effect_no_modifiers	Danger 0
null_effect	effect_new_enemies	Danger 1 (and above)
null_effect	effect_elites	Danger 2 (and above)
null_effect	effect_more_elites	Danger 4 (and above)
projectiles_on_hit_effect	effect_projectiles_on_hit	Cactus Mace, Sniper Gun
projectiles_on_hit_effect	effect_lightning_on_hit	Lightning Shiv
projectiles_on_hit_effect	effect_slow_projectiles_on_hit	Thunder Sword
slow_in_zone_effect	effect_slow_in_zone	Taser
weapon_stack_effect	effect_weapon_stack	Stick

List of Effect Keys

Lists most of the effect keys, taken the effect init arrays in run_data.gd (init_tracked_effects & init_effects). Many of these can be applied with effect.gd (res://items/global/effect.gd).

See Stats > Secondary Stats for a list of the items these effects can apply to.

Primary Stats

Effect Key	Notes
stat_max_hp	Max HP
stat_hp_regeneration	HP Regeneration
stat_lifesteal	Life Steal
stat_percent_damage	Damage
stat_melee_damage	Melee Damage
stat_ranged_damage	Ranged Damage
stat_elemental_damage	Elemental Damage
stat_attack_speed	Attack Speed
stat_crit_chance	Crit Chance
stat_engineering	Engineering
stat_range	Range
stat_armor	Armor
stat_dodge	Dodge
stat_speed	Speed
stat_luck	Luck
stat_harvesting	Harvesting

Misc

Some of these are repeated form above, others are only set with effect_key. Search the decompiled project for effect_key to find the latter.

key	text_key	Used In (effect file, *.tres)
additional_weapon_effects	~	multitasker_effect_2
alien_eyes	effect_alien_eyes	alien_eyes_effect_1
bounce	effect_bouncing	ricochet_effect_1
bounce_damage	~	arms_dealer_effect_1b, engineer_effect_4, farmer_effect_4, one_arm_effect_2
burn_chance	effect_burn_chance	scared_sausage_effect_1
burning_cooldown_reduction	effect_burning_cooldown_reduction	eye_surgery_effect_1
burning_spread	effect_burning_spread	snake_effect_1
can_attack_while_moving	effect_cant_attack_while_moving	soldier_effect_5
cant_stop_moving	---	Unused, but appears to have some code that supports it.
chance_double_gold	effect_chance_double_gold	metal_detector_effect_1
consumable_heal	effect_consumable_heal	alien_worm_effect_2, lemonade_effect_1, weird_food_effect_1, chunky_effect_3, chopper_effect, chopper_4_effect
convert_stats_end_of_wave	effect_convert_stat_end_of_wave	demon_effect_1
diff_gold_drops	---	Unused, but appears to have some code that supports it.
dmg_when_death_from_luck	effect_deal_dmg_when_death	cyberball_effect_1
dmg_when_pickup_gold_from_luck	effect_deal_dmg_when_pickup_gold	baby_elephant_effect_1, lucky_effect_3
dodge_cap	effect_dodge_cap	ghost_effect_3
double_boss	effect_double_boss	difficulty_5_effect_4
double_hp_regen	effect_double_hp_regen	doctor_effect_3
double_hp_regen_below_half_health	effect_double_hp_regen_below_half_health	potion_effect_1
enemy_gold_drops	effect_enemy_gold_drops
enemy_speed	---
enemy_strength	effect_stronger_enemies	difficulty_3_effect_2, difficulty_4_effect_2, difficulty_5_effect_2
explode_on_death	effect_explode_on_death
explode_on_hit	effect_explode_on_hit
explosion_damage	~	dynamite_effect_1, explosive_shells_effect_1, etc
explosion_size	~	plastic_explosive_effect_1, artificer_effect_1b
free_rerolls	effect_free_shop_reroll
gain_bounce_damage
gain_explosion_damage
gain_pct_gold_start_wave	effect_gain_pct_gold_start_wave	piggy_bank_effect_1
gain_piercing_damage
gambler
gold_drops	effect_enemy_gold_drops	explorer_effect_8, farmer_effect_3, streamer_effect_2b
gold_on_crit_kill	effect_gold_on_crit_kill	hunting_trophy_effect_1, dagger_effect
group_structures	effect_group_structures	engineer_effect_3
harvesting_growth	effect_harvesting_growth	crown_effect_1, farmer_effect_2
heal_when_pickup_gold	effect_heal_when_pickup_gold	cute_monkey_effect_1
hp_cap	effect_hp_cap_at_current_value	handcuffs_effect_4
hp_shop	effect_hp_shop	demon_effect_2
hp_start_next_wave	effect_hp_start_next_wave	weird_ghost_effect_2
hp_start_wave	effect_start_wave_less_hp	sad_tomato_effect_2
inflation	---	Inflation was removed. It was part of the original demo.
instant_gold_attracting	effect_instant_gold_attracting	baby_gecko_effect_1, sifds_relic_effect_1
item_box_gold	effect_item_box_gold	bag_effect_1
items_price	~	coupon_effect_1, entrepreneur_effect_0, mutant_effect_2, saver_effect_4
knockback	effect_knockback	boxing_glove_effect_1
leave_burning
lose_hp_per_second	effect_lose_hp_per_second	blood_donation_effect_2, sick_effect_3
map_size	~	explorer_effect_6, old_effect_3
max_melee_weapons	effect_generalist	generalist_effect_3
max_ranged_weapons	[EMPTY]	generalist_effect_4
max_weapon_tier	effect_max_weapon_tier	wildling_effect_3
min_weapon_tier	effect_min_weapon_tier	knight_effect_4
neutral_gold_drops	~	Increases materials from EntityType.NEUTRAL by +x% (ie. trees)(see also: enemy_gold_drops)
no_melee_weapons	effect_no_melee_weapons	ranger_effect_5
no_min_range	~	Seems to be used but not sure of its effect
no_ranged_weapons
number_of_enemies
one_shot_trees
pacifist
pickup_range
piercing
piercing_damage
projectiles_on_death
recycling_gains
remove_speed
starting_item
stat_links
stats_end_of_wave
structures
temp_stats_on_hit
temp_stats_stacking
temp_stats_while_not_moving
torture
trees
trees_start_wave	not specified
unique_weapon_effects
wandering_bots
weapon_bonus
weapon_class_bonus
weapon_slot	effect_no_weapons / effect_max_weapons
xp_gain