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Patch Notes: Early Access (EXPERIMENTAL) - v0.4.0.0 – Build 146871. This patch was released on March 16, 2021. It is the first patch of Update 4 development.

The original post can be viewed on Satisfactory's Discord, Reddit and Steam.


Hi Pioneers!

Here it is, Update 4 out on Experimental. Before you read through everything here, you might want to check out our Patch Notes video showcasing all the cool new stuff that has been added to Satisfactory in this update. Here is the link to the video:

We’ve already teased and showcased a bunch of the content that you are getting with this patch, but there are some spicy surprises we were hiding until the release. Now Satisfactory is taking to the air with Aerial Transportation for your resources and the Hover Pack to make factory building and traversal extra smooth. Additionally, we have added Lights to the game in a way that should not immediately destroy your performance. We are still working on them, but we hope you will already find them quite enjoyable. On top of this the Power Storage and Generator changes will affect how you deal with dreaded blackouts and the updated Tier 7 and added Tier 8 bring a whole lot of new late game content for you to play with. Together with the new content we’ve also worked on lots of smaller and bigger changes across the game to improve it, there are improvements to networking, optimisations, UI, quality of life, all the good stuff. You can find the full list in the patch notes below.

Of course, this is the initial Experimental release of Update 4 and that means we are still actively working on many of these features and improvements, but now we want you to try them out and give us feedback. If you find issues or have feedback for us, you can post it on the Questions Site or upvote existing posts to let us know what is important to you. The site can be found here: We are expecting this update to spend around a month on Experimental for us to be able to react to your feedback and fix everything up nicely for the Early Access release. With that in mind we are aiming for it to be fully released on the 13th of April. Fingers crossed on that for all of you waiting for the update to be stable!

Since we are still actively working on this content there are some issues known to us that you can find in their own section at the end of the patch notes if you want to check them first before switching to Experimental.

Update 4 is one of the biggest updates we have made so far. We started working on it after summer last year alongside 3.5, so it is super exciting to finally share it with all of you. Hope y’all are going to enjoy it a lot!

Cheers and thank you for playing and sharing the awesome stuff you do in Satisfactory <3

New content[]


  • Rebalanced all production lines containing Bauxite/Aluminium
    • This includes alternative recipes
  • Rebalanced Nuclear production lines
    • This includes alternative recipes
  • Removed Uranium Pellets as part of this rework
  • All conveyor fed Generators now always produce at full capacity instead of regulating their power output to factory consumption
  • Geothermal Generators now produce a fluctuating amount of power
  • Geysers now have purities which affect the minimum and maximum amount of power a Geothermal Generator can produce
  • Upped stack sizes for several commonly used items
  • Rebalanced progression of inventory slot increases
  • Decreased Fuel burn rate in Fuel Generator from 15 per minute to 12 per minute
  • Added several new Crash Sites so there are enough Hard Drives for additional alternate recipes


  • Changed the Tier 7 progression to work with the new Tier 8 content (this has no effect on already unlocked content)
  • Added a global MAM research completion sound


  • Optimized and replaced lots of particle systems and VFX #praisesimon
  • Implemented a new Conveyor Item Renderer (Experimental)
    • We are testing this new system to reduce the cost of having many conveyors items moving. It is still work in progress but can already have positive effects depending on your system. We are continuing to work on this while Update 4 is on Experimental.
  • Implemented a Pooling System for building components
    • This system is intended to reduce objects in the game
  • Implemented new impostors for factory buildings
  • Optimized Power Lines
  • Tweaked LOD timings and reduced number of elements on LODs
  • Added some optimizations of the Train functionality

Quality of Life[]

  • Implemented proper snapping functionality for Water Extractors
  • Added ability to copy and paste settings in buildings (such as selected recipes, overclocking, etc.)
  • Added a quick switch radial menu in the Build Mode that can be accessed by pressing “E” to switch between similar buildings like different Power Poles
  • Added a directional arrow to the Hyper Tube Entrance hologram
  • Quick search (opened with N) now closes when hitting Enter with an empty search field


  • Added compression of hidden map data when sending it to clients
  • Made sliding more stable to use for clients
  • Implemented an improvement for choppy player movement in multiplayer
  • Testing a possible improvement for choppy vehicle movement in multiplayer


  • Updated the style and info of all production UIs
  • Updated multi-output production UIs to better display the recipe information
  • Added maximum consumption and Power Storage information to the Power Graph
  • Updated the Power Graph to show the last minute of power history
  • Changed respawning to Right Mouse Button
  • Overhauled the attention ping (Alt + Left Mouse Button) so it indicates when it is off screen and shows distance to ping when it is centered on screen
  • Made several additions to the AWESOME Shop UI: Favorites, product page, related schematics, image gallery, descriptions and a search bar that can be activated by pressing Space Bar like in the Build Menu
  • The AWESOME shop now displays the cost to build the specified buildings in the schematic that you want to purchase
  • Moved the warning errors in the Pipeline Pump UI to the center
  • The recipe scroll box in the build menu now properly covers the whole area
  • Added scrolling support with arrow keys in the chat window
  • Right click menu on inventory slots and buildings in the Build Menu has option to open the appropriate Codex page
  • Re-shot Liquid Biofuel icon to look less like Oil
  • Added option for High contrast build/dismantle mode – places a semi-opaque backdrop behind text
  • Added option for small/large slots in build/dismantle mode
  • Production UI now has a search bar to find specific recipes
  • Overclocking no longer rounds to nearest whole percent
  • Overclocking now supports math formulas when entering a number (similar to the Quick Search)
  • Tooltips on inventory slots now display which Building the part/recipe is produced in


  • Tweaked sounds on all vehicles
  • Improved sounds for different production cycles on Constructor, Manufacturer
  • Updated factory building leg texture and mesh
  • Added specific factory building legs for the Space Elevator


  • Polished Dune Desert Maze layout (south west corner of the Dune Desert)
  • Implemented several new ambient VFX and an automated proximity-based system to spawn them
  • Added support for area specific music with a few new music tracks
  • Tweaked and added some caves in the Dune Desert
  • Polished a large list of environment assets


  • Added some additional animation, VFX and sound feedback to the Lizard Doggo


  • Improved first person and third person Parachute animations, VFX and sounds
  • Polished the Object Scanner mesh
  • Polished Chainsaw animations and sounds
  • Overhauled the Color Gun visuals and sounds

Player character[]

  • Tweaked landing and footstep sounds
  • Reworked swimming and water impact sounds


  • Overhauled options menu functionality
  • Added a menu volume slider for UI sounds
  • Added some Build & Dismantle Mode contrast options
  • Added an option to toggle small or big slots in Build & Dismantle Mode

Bug fixes[]

  • Fixed Miner Mk.1 sound start-up/stop bug
  • Fixed client players always having full fuel on equipping a Jetpack
  • Fixed a sound bug that occurred when dying under water
  • Fixed a sound bug that occurred when triggering water effects with vehicles
  • Train track switch positions now update correctly for 3 or more outgoing tracks
  • Fixed several localization bugs (with around 3000 words translated by the community as a result)
  • Buildings now show power consumption in MW in the Build Menu
  • Clients driving Trains should no longer get the “No Power” message while having power
  • Fixed Miners Mk.1&2 sometimes not shutting down properly
  • Fixed bugs that resulted in extreme velocity when sliding under certain conditions

Known issues[]

  • Some conveyor belt items look odd due to the new Conveyor Subsystem, this will be fixed soon
  • Conveyor Lifts items don’t show up correctly in some situations
  • Conveyor belt items can visually disappear in some situations
  • First initialization of new conveyor items can affect performance for a few frames
  • Freight cars have a collision where the container should be even if there is no container there
  • The game may crash if it is Fullscreen and loses focus while the world is loading. A workaround is to change from Fullscreen to Windowed Fullscreen in the Video Options