Steam Vent

#Overview

Steam Vent surrounds Tibo with a cloud of hot steam. It has no cooldown and fires no projectiles: every 0.5 seconds it damages every enemy within 32 units of Tibo for 5, with a light knockback. Levels raise the damage to 30 per pulse and more than double the radius, to about 67 units at level 8.

It is one of the 17 weapons a standard run can start with, and it is offered on level-up. At level 8 a chest evolves it into Pressure Cooker if you own Root Network. See Evolutions.

#How it works

Each pulse hits everything inside the circle, then waits hitInterval (0.5 s) for the next one.^[1]

Because it is an aura weapon, two common stats do nothing for it:

• Cooldown reduction does not speed up the pulses; the pulse timer uses hitInterval directly, and the weapon's cooldown is 0 (see Stats).
• Amount bonuses are ignored for aura weapons.^[2]

Area and damage do help: the radius is 32 × area, and damage bonuses apply to every pulse.

Measured in the headless sim (tools/play.mjs, build 41 main-B2gf34bA.js, Standard, Normal, god mode, seeds s1, s2 and s3; the seeded starting weapon removed, the weapon given with give, spawning stopped after 4 s of play and the pests already on the field held at fixed spots with 10⁹ HP; Tibo standing still, facing right, with 8 pests in a line 20 to 90 units to his right): at level 1 it pulsed every 0.5 s and hit the pests at 20 and 30 units but never the one at 40; at level 8 it pulsed every 0.5 s and hit every pest out to 70 units but not the one at 80. All three seeds gave the same figures.

#Tips

• Steam Vent rewards staying close to enemies, so defensive passives such as Starch Plating (armor) or Thick Skin (dodge) help it, since you will be taking contact hits while it works.
• If Steam Vent is a main damage source, area (Big Bowl) and damage (Butter Pat) do more for it than cooldown or extra projectiles.

#Stats

Values are the raw numbers from the game's definitions, before Tibo's global stat multipliers, difficulty and time scaling. In play, Tibo's base stats add +1 amount to every weapon except aura, cone, nuke and ring weapons, and make every duration ×1.25 (see Stats). Field names in code are the game's internal names. Attack descriptions such as “Melee slash” are this wiki's summary of the internal attack kind.

#Level progression

Each level-up adds the listed change to the weapon's raw values. Totals are cumulative.

#Base values

#Behaviour parameters

Raw parameters of the attack (behavior), copied from the game definition. What they do in play is explained under How it works above.

#Obtaining

• Offered as a card on level-up (offer weight 90).
• Listed in the game's player.startWeapons pool (see Level-up).

#Evolution

Result	Requires	Type
Pressure Cooker	Steam Vent (max level) + Root Network	Evolution

#Names in other languages

Verified: the name the game shows when another language is selected in Settings, from its translation files.^[3] See Languages.

#Data

{
  "id": "steam-vent",
  "tier": "base",
  "base": {
    "damage": 5,
    "cooldown": 0,
    "amount": 1,
    "area": 1,
    "speed": 0,
    "duration": 0,
    "pierce": 0,
    "knockback": 0.4,
    "interval": 0.1
  },
  "levels": [
    {
      "area": 0.2,
      "damage": 2
    },
    {
      "damage": 3
    },
    {
      "area": 0.3
    },
    {
      "damage": 6
    },
    {
      "area": 0.3
    },
    {
      "damage": 6
    },
    {
      "area": 0.3,
      "damage": 8
    }
  ],
  "weight": 90,
  "behavior": {
    "kind": "aura",
    "size": 32,
    "hitInterval": 0.5
  }
}