Chernobyl: Simulator

WEEKLY UPDATE #4

Rikarin Studio

This update focuses on performance, usability, and stability. VRAM usgae has been reduced by approximately 75% through extensive texture optimizations, the user interface has been completely redesigned, and save management has been improved with support for non-destructive sub-saves. Numerous bugs have been fixed across Windows and macOS, several simulation systems have been corrected to better reflect real-world behaviour, and visual consistency has been improved throughout the control room.

Breaking Changes

  • AR-1, AR-2, and AR-M's Measurement and Execution switches now correctly select the required number of channels for AR operation (3 or 4), matching real-world functionality.

Improvements

  • Optimized textures to significantly reduce VRAM usage (from approximately 8 GB to ~2 GB).
  • Completely revamped UI, including:
  • Main Menu
  • Settings
  • Load Game
  • Dialog Windows
  • Task List
  • Intro Dialog

Added descriptions for every setting option.

Updated and improved translations.

Reworked save management: saving the game generates a new save file instead of overwriting the previous one. Old saves can be pruned though Load page.

Retextured wall panels to use a single tileable texture, reducing GPU memory consumption.

Added missing control logs.

Added an option to mute UI background music.

Improved visual consistency of Selsyn and DKE red/green indicator lamps.

Fixes

  • Fixed multiple Windows-specific crashes.
  • Fixed a black screen issue that could occur after changing settings on Windows.
  • Fixed persistence issues affecting period logic malfunctions.
  • Fixed LAR incorrectly using the AZ-5 signal instead of the AZ-5T trigger signal.
  • Fixed resolution-related issues in the settings menu.
  • Fixed various display issues in the settings menu.
  • Fixed memory leaks caused by repeatedly starting and quitting games.
  • Fixed windowed mode issues on macOS.
  • Fixed an issue where interaction outlines briefly flashed white before turning blue.
  • Fixed DKE/SFKRE power release indicators around selsyns to correctly display power release deviations (red/green).
  • DKE probes now use ion chambers with current corrections and a noise threshold for improved accuracy.
  • Temporarily disabled DirectX 12 on Windows due to ongoing Unity engine issues.

Community Translations

Want to help translate the game? Contribute here:

If you experience any issues you can switch to last-update branch.

This announcement was originally published by Rikarin Studio on Steam on Jun 6, 2026.

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Chernobyl: Simulator

$19.99casual · early-access

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