IITPP | Update Changelog

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Core Expansion Update Part 1 (3)
Core Expansion Update Part 1 (3)600×200 112 KB

Innovation Inc. Thermal Power Plant Thermal Generators Update | 11th July 2026

Geothermal Generators

  • Added a new generator control room featuring 5 types of controls
  • Generators and generator hall completely revamped
  • New generator startup sequence
  • Fire event significantly expanded with new gameplay and interactivity
    • Multi-stage event, including blackout stage with real consequences
    • Three interactive puzzles for generator repair
    • Central fire suppression repair puzzle — Ashi & Myster
    • Three new songs: Kindling Flame, Dead Circuit (ALT song), and Lights Out — Syashikunda

Emergency Bunker

  • Expanded activation process with key-finding mechanic and visual startup sequence
  • Complete overhaul to all areas, including a new interactive comms room
  • All three endings remastered for the new bunker (further updates coming with the single-player expansion)
  • Quality of life improvements to jerry can spawning — Myster
  • Ready for single-player expansion endings

Storage Rooms

  • Completely revamped rooms (4x bigger)
  • New storage room distribution system
    • Deliver cubes to earn credits
    • Buy and upgrade capacity or unlock the distribution tablet
    • Delivery Race feature when two players compete simultaneously
    • 6 badges for progression
    • Compete on the leaderboard
    • Available in Storage Room Alpha, Storage Room Beta, Emergency Bunker, and Topside Warehouse
  • 3 new interactive and easter egg badges

Server Room

  • Revamped server room and mainframe connector — Raptor
  • Interactable server modules: personnel archive and memo archive (lore)
  • Manage server temperature with coolant tanks and coolant canisters from storage distribution
  • New diagonal mainframe elevator — Raptor

Interactive Mini-Events

  • Cargo Shipment: deliver barrels to the cargo elevator at Topside Warehouse
  • Coolant Blockage: coolant supply outlet blockage, causing the pool to drain and pumps to disable
  • Server Overheat: heatsinks failing, causing server overheat. Distribute coolant to fix
  • Laser Misalign: reactor core power laser alignment failure, recalibrate frequencies to fix
  • Distribution Surge: storage distribution spawn rates doubled and rarity increased for 5 minutes

New Tasks — GGshor

  • Task system completely rewritten
  • 6 new help and prevent tasks for NPC Yu
  • 6 new events and research tasks for NPC Munshi

New Player Onboarding

  • Facility welcome tutorial on first join
  • Reactor core operations tutorial in core control room
  • Geothermal generators operations tutorial in generator control room
  • Storage distribution system tutorial in Storage Room Alpha and Beta
  • Tutorial replay available in settings

Additional Content

Topside Shop

  • Topside Shop revamped — Nextgencrabs
  • New credit items shop (in topbar shop), including normal speed coil, new medkit, and new military flashlight

Facility Systems

  • Tram line additions and revamped voice lines
  • Facility elevator shaft and both topside and bottomside rooms refreshed
  • Facility elevator speed increased
  • Elevator status screen added to the bottom elevator room
  • Tram station doors now open faster
  • New random ASAS voice lines
  • New random TV screen slides
  • Emergency TV slides revamped
  • New comms board system at Security HQ, Facility Control Room, Bunker, and Topside External Comms
  • New custom audio settings for adjusting alarm volume and ASAS vs personnel announcements
  • Core startup can no longer be activated when an event is active
  • Startup failure laser recalibration ported to the new frequency matching minigame

Coolant and Reactor

  • Coolant Pump Station refreshed with new coolant pool system
  • Coolant Pump Station hallways refreshed — Nextgencrabs
  • APHES wearers are now immune to coolant damage
  • Power laser overload is now repairable
  • Power laser status announcements during startup now accurately reflect overload state
  • Added advanced light flickering system from the fire event to meltdown and shutdown fail

Lore and Exploration

  • Completely revamped lore emails (27 new ones)
  • Facility tour panels: 18 in total (new badge)
  • Restroom door knocking guy (new badge)
  • Removed all self-inserts in-game

New Music

  • Remastered the part where he kills you — Syashikunda
  • The Part Where He Kills You alternative — Zadonoace
  • Stability Drop (Alternate Frostbound) — Syashikunda

Models and VFX

  • Revamped barrels — Marcus3205
  • Turret new model
  • Alarm new model — CodedKryptics
  • Revamped all key turn and button press panels
  • VFX renewals — CodedKryptics
    • Black hole, space shuttle, power lasers, warhead
  • Normal flashlight updated

Quality of Life

  • New intro sequence with in-tram cinematic and GUI overhaul
  • Shift to speedcoil — Myster
  • Portal code rewritten — Myster
  • Converted the 3 core control and 2 generator control room doors to non-fail/repair doors
  • Vertical heavy doors when broken now jitter at a higher position, allowing players to pass underneath
  • All facility NPC animations reworked — CodedKryptics
  • All inspectables rewritten — Myster

Balancing

Buffs

  • Tram slow speed mode increased: 20 → 25
  • Tram stop duration shortened: 15s → 12s
  • Tram volcano airlock cycle time reduced
  • Facility elevator speed increased
  • Tram station doors open faster: 11.7s → 8.7s
  • Decreased door repair fail rate: 20% reduced to 15%
  • Reduced door repair time: 7-15 seconds reduced to a flat 5 seconds

Nerfs

  • Major event probability changed from 12-15 minutes to 25-35 minutes
  • Manual turret range halved: 200 → 100
  • Manual turret fire delay increased: 0.1s → 0.3s
  • Manual turret damage reduced: 5 → 2
  • Manual turrets now have a maximum uptime of 15 seconds (can no longer stay active indefinitely during constant zombie flow)
  • Speed coil stacking is no longer linear, now uses a ^0.7 exponential curve
  • Disinfector assault rifle price: 800 → 1000
  • Disinfector shotgun price: 800 → 900
  • Disinfector submachine gun price: 250 → 300

And roughly a billion building fixes.

Past Updates

2025 Christmas Update | 06/12/2025
  • Returning Christmas Features
    • Return of John the Snowman and his Badge
    • Return of Santa Bot
    • Christmas Themed Startup OST and Intro (Syashikunda)
    • Returning Christmas Decorations
  • New Christmas Features
    • New addition of the Combat Elf NPC, located next to Santa Bot
    • Christmas Pistol (attainable by completing the Combat Elf’s request)
      • Slows zombie movement by 15% for 3 seconds. Effects do not stack
      • Uses standard pistol damage
    • Ice Zombie Mutation
      • Slows player movement by 20% for 3 seconds. Effects do not stack
      • Immune to the Christmas Pistol’s slowing effect
      • Uses standard zombie health and speed values
    • New snowball tool
    • Christmas Uniforms and Custom UGC in Topside Shop
    • Rearranged Mini-PowerLaser™ locations
    • New Site Director and Connor Rogers Snowman Voicelines
    • Various New Christmas Decorations
      • John has cursed the facility with snow, everywhere! (Rqptcr)
      • Snowmen and Snowforts, everywhere! (Rqptcr)
  • Speed Coil Debuff (CodedKryptics)
    • 0–10% infection: 10% speed boost reduction
    • 10–100% infection: scales linearly and proportionally up to each coil’s max reduction
  • New Ventilation and Security Control system in Advanced Machinery
    • Added facility-wide background ambience for all vents
    • Motion detectors in the new ventilation system
    • Checkpoint door locking is now enabled
    • Added new ventilation zone control system to close/lock off specific vents
    • Added CCTV to advanced machinery vents, accessible from the security room
    • New email in the security room
    • Added a connecting vent from the biodome watch tower to one of the biodome hallways
  • Slightly adjusted CCTV UI and sound effects to the security hq and vent system
  • Additional Topside Turrets and Elevator Invisible Barrier fixed
  • Clouds in the sky (Rqptcr)
  • Glint chat restrictions indicator (TheNexusAvenger)
  • Added Heat Afinity Remix (Syashikunda)
  • Security HQ Tramline access turret moved inside
  • Pet room turrets are now manual, and new preventions for balls to leave the room
  • Removed collisions for topside tree leaves
  • Fixed mutator quarantine not working as intended
2025 Halloween Update | 11/10/2025
  • Halloween decorations and the return of Sinister Jack!
  • Return of Halloween Startup OST
  • Limited-time spotlight for task NPC, Dr Zomboss, awarding higher credits (75 credits up from 35)
  • Return of limited-time Skeleton Party event and badge
Quality of Life Update | 05/01/2025
  • Tram and elevator movement optimisations (Project Mosaic by TheNexusAvenger)
  • New Cargo Tram variant, now with overall increased frequency
  • New and revamped visual effects: (By Codedkryptics)
    • Safeguard explosion
    • Meltdown/Shutdown Fail damage fire/gasses
    • Blackhole
    • Shuttle launch sequence
    • Outbreak event destruction
    • Jerry cans
  • Remastered animations for: Dr Munshi, Security Officer Yu, Engineer Berkley and Outbreak Helicopter (By Codedkryptics)
  • Building refresh/improvements:
    • Sector A hallway
    • Core control room and surrounds
    • Main elevator connector hallway and security room
    • Sector D connector hallways (By combined staff)
    • Cafeteria bridge (By Borobushe)
    • Tram Central moving walkways
  • New alternate songs: (By Syashikunda)
    • Enter the Flames Encore
    • Frozen Force
  • Facility announcements:
    • Voice acting performances from Kylealta, CodedKryptics and ACTUALWEREW0LF for new original characters (also seen in events)
    • 26 new ASAS announcement lines
    • Removal of outdated announcements and any referencing self-inserts
    • Remade Military Announcement System for the Outbreak Event
  • Safeguard chance rebalances
    • Old safeguard system relies on time passed. This has been changed to rely on temperature.
    • Stage 1: 3500K - 3850K → 100% success
    • Stage 2: 3850K - 4200K → (Nerfed from 80% → 75% Success)
    • Stage 3: 4200K - 4500K → (Nerfed from 50% → 40% Success)
  • Shutdown chance rebalances
    • It can now occur multiple times instead of just an instant fail on the second shutdown. Shutdown with a safeguard will still result in a fail.
    • 1st shutdown: Buffed from 50% → 75% Success Rate
    • 2nd shutdown and onwards: Success rate will be halved each time until it reaches 10%, where it bottoms out and stays at 10%.
  • Anti-exploit improvements (By GGshor)
  • New signage system across the facility
  • APHES can now be taken off (no more superglue!) (By GGshor)
  • Coffee tool is now drinkable!
  • Ladder added to core access elevator
  • 9 new posters
  • New Emergency Phones around the facility to request help!
  • Main elevator speed increased
  • New zombie mutations (after 5 minutes)
    • Tank Zombie (RED)
      • Walk speed decreases from 18 → 14
      • Body is scaled * 1.7
      • Jump power increased 38 → 42 to accomodate increased size
      • Infection radius slightly increased 15 → 17
      • Infection rate slightly increased 10 → 12
      • Health is multiplied by 1000%
      • Regen rate is removed
    • Infectious Zombie (YELLOW)
      • Infection radius greatly increased 15 → 18
      • Infection rate greatly increased 10 → 15
    • Fast Zombie (BLUE)
      • Walk speed increases from 18 → 23
      • Health is decreased by 30%
      • Unique animation (werewolf pack)
      • Infection radius decreased 15 → 13
  • New mutated badge
  • Dr Zomboss is now permanently in the game, found in Sub-Level 1A
  • Ending credits updated to be up-to-date
Disinfector and Zombie Rebalance

  • All bullet sizes increased from 0.1 → 0.25

  • New default reloading SFX for all guns (no longer a microwave)

  • Pistol reload time reduced from 4 → 3

  • Pistol bullet spread reduced from 1.5 → 0.5

  • SMG reload time reduced from 4 → 3

  • SMG ammo count increased from 20 → 25

  • SMG fire rate decreased from -0.03 → -0.04

  • SMG damage reduced from 8 → 6

  • SMG spread slightly increased

  • Shotgun spread increased from 3.5 → 4.5

  • Shotgun damage increased from 10 → 11

  • Sniper click delay removed

  • Sniper spread completely removed

  • Sniper ammo count increased from 3 → 4

  • Sniper bullet speed increased from 1000 → 1500

  • Sniper bullet size increased from 0.1 → 0.3

  • Sniper bullet trail increased from 100

  • Sniper fire rate decreased from -0.05 → -0.07

  • Assault rifle damage increased from 4 → 7

  • Assault rifle fire rate decreased from -0.05 → -0.07

  • Assault rifle reload time increased from 4 → 5

  • New assault rifle fire SFX

  • Minigun charge time increased from 1.75 → 2.5

  • Minigun ammo count increased from 250 - > 275

  • New Minigun reload SFX

  • New Minigun fire SFX

  • As a partially infected human, the decay rate of infection is increased from 1 → 2

  • Zombie jump power reduced from 40 → 38

  • Zombies can no longer activate turrets

  • Zombies can no longer use the mutator

2024 Christmas Update | 07/12/2024
  • Return of John the Snowman (NEW ANIMATIONS and VFXs) and his Badge
  • Return of Santa Bot
  • Various Old and New Christmas Decorations
  • Brand New Christmas Themed Startup OST
2024 Halloween Update | 26/10/2024

  • Halloween decorations and the return of Sinister Jack!

  • Return of limited-time task NPC, Dr Zomboss

  • Return of limited-time Halloween event

Magma Renewal Update | 29/6/2024

Note: Due to the large amount of content added in the Thermal Generators Update, and with more still planned, the team has decided to release a portion of it separately as the Magma Renewal Update. We offer this update as a small apology for the past year of inactivity.

  • Rising Magma Event Renewal

    • No longer automatic, the event requires player interaction to activate the draining systems
    • Similar to/replaces the current Fire Event mechanics. The Thermal Gens Update will introduce a much more interactive style of fire suppression gameplay
    • New ASAS voice lines and SFXs

  • Topside Reception Revamp

  • Warhead Event Revamp

    • Features a redesign of the warhead hallways and control room by Borobushe
    • The laser hallway and the new waste processing room is now randomised. Five different obbys available!
    • Small changes to ASAS lines, and SFX

  • New and Upscaled TV Screen Slides

2023 Christmas Update | 1/12/2023

  • Return of John the Snowman!

  • Christmas Decorations

2023 Halloween Update | 15/10/2023

  • Halloween decorations and the return of Sinister Jack!

  • New limited-time task NPC, Dr Zomboss.

  • New limited-time Halloween event (not as big as Christmas).

  • Revamped office complex

Mutations Expansion Update | 26/12/2022

  • Added new Zombie Outbreak event (When 60% of players have turned into a zombie in a 15+ player server)

    • Two new endings of ‘Witness Protection’ and ‘The Apocalypse Ending’ with respective badges

  • Expanded topside sector

    • Topside warehouse/storage
    • Command & Communications center

  • Zombie GUI colour changer toned down to be less green

  • Additional voice lines provided by CombatSwift for ‘The Happy Ending’, 'Witness Protection and more

  • Closed captions/subtitles for all audio-related elements

  • Revamped Medical Bay room (by Borobushe)

    • added additional emergency disinfector chamber

  • Revamped core safeguard (by Borobushe)

    • New animations, visual effects and sounds
    • Startup and failure songs remastered by Heathsroms2

  • 13 New random facility ASAS announcements and 11 new facility Kylealta announcements (101 total LOL). New posters and TV slides were also added.

  • Return of ‘John’ the snowman

    • New animations (CodedKryptics), voice lines and song
    • Badge re-enabled

  • Return of Santa Bot V12.25

    • Get a random free gear from him on every new server

  • Christmas decorations

  • New ‘Event Horizon’ badge for death by Blackhole

  • Added alternate soundtracks (Heathsroms2)

    • Some events have a low chance to play an alternate soundtrack

  • Additional bug fixes

Mutations Update | 1/4/2022

  • Added Zombies (scripted by local_ip and TheNexusAvenger)

    • new badge
    • Mutator room added in advanced machinery

  • Added Disinfectors (scripted by local_ip and TheNexusAvenger)

    • credit shop menu (scripted by GGshor and TheNexusAvenger)
    • 6 guns

  • Tasks + Credits system (scripted by theyard1 and GGshor)

  • Tram Line System added (scripted by DrMaher) (Renewed by TheNexusAvenger)

    • 5 individual stations

  • Sector D Expansion/Revamp

    • Facility control room location change and revamp
    • Hallways added/expanded (connections with Sector C and Cafeteria)
    • Biodome watchtower revamp
    • Office complex expansion
    • Volcano access room revamp

  • Portal room finished in advanced machinery (scripted by mr_tix6v2)

    • 6 individual locations available to explore

  • Topside Carpark added

    • new ending

  • Facility Navigation Map added

  • Security HQ revamped

    • renewed security cameras
    • TOILETS

  • Quality of Life improvements

    • Improved lighting transition
    • Renewed topside overhead jets
    • Optimised emergency lights
    • Smoother doors
    • Updated team changer GUI
2021 Christmas Update | 21/12/2021
  • Return of ‘John’ the snowman
    • Found at 500 Kelvin, replacing the ‘inbound’ section of shutdown fail
    • Badge re-enabled
  • Return of Santa Bot V12.25
    • Get a random free gear from him every new server
  • Christmas Decorations
2021 Halloween Update | 17/10/2021

  • Cafeteria Revamp

    • PIZZATRON 2000

  • Topside stairwell

  • Halloween Decorations

  • Sector A small doors renewed

  • 30 new announcements (85 total now!!)

  • General bug fixes

Core Expansion Update Part 2 | 7/10/2021

  • Brand new core shutdown event

    • Power laser overload to prevent auto-shutdown
    • 50% for a successful shutdown (re-startup required)
    • Shutdown success badge
    • 50% for shutdown failure (fr**zedown)
    • New ‘The Cold Ending’ w/ badge
    • Use the space shuttle to escape

  • Updated lore

    • ‘lore’ / story pieces in the form of e-mails on computer / laptop screens are now available around the facility. Can you find ALL 22 of them?

  • Renewed the warhead event

    • New lines added / replaced to aline with the renewed warhead / facility ‘lore’
    • Improved visual effects with the explosion

  • Abandoned Pinewood Thermal Plant revamp

    • Added ‘lore’ / story pieces to find

  • Renewed the Truth Ending

    • Replaced lines to aline with the renewed game ‘lore’

  • Facility TV screen panels renewed and improved

  • General bug fixes

Core Expansion Update Part 1 | 17/8/2021

  • Reactor control room revamp

    • New core statistics/control screens and buttons
    • Room and surrounding layout changed w/ new server room

  • Core control systems rewrite

    • Core temperature readings are now in Kelvin (K)
    • Changed coolant valve control to just coolant laser control
    • Added power laser controls (contributes to temperature) w/ new walkways in core chamber
    • Removed core power level controls
    • All core control scripts rewritten (full credit to local_ip)

  • Startup renewed

    • Startup voice lines renewed
    • Startup failure implemented
    • Startup song remastered w/ new startup failure song by Heathsroms2
    • Startup success badge added

  • Complete meltdown revamp

    • Completely new voice lines
    • Meltdown extended w/ new song (Heat Affinity by Heathsroms2)
    • Enter the Flames, CP Violation remix and Nuclear Mission Jam remix all remastered by Heathsroms2
    • Facility lockdown doors added
    • So much more facility damage
    • NAS radio transmission added
    • Facility TV warnings revamped

  • Coolant Pumps Revamped

  • Rising magma event slightly renewed and readded

  • New space shuttle evacuation option, available for warhead and meltdown (also for freezedown which will be in update part 2)

    • New ending w/ new badge
    • New space and atmospheric research and technology topside area
    • Topside “outside” viewable

  • All game endings renewed w/ some new additional scenes

    • credits revamped w/ specific scenes to each ending

  • Vents revamped, tip: use vents to avoid lockdown doors

  • New admin script/systems (full credit to GGshor)

  • New main elevator script w/ epic failure during meltdown (full credit to GGshor)

  • New intro song by Heathsroms2 w/ team choice now integrated into the intro

  • New revamped posters

  • Meet the creator badge fixed

  • Decoration improvements

  • General bug fixes

  • Added Obama

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