[Game Update] - 391330

Release Date: 01/23/20

This is a hotfix release.

Update Information:

Hello friends! Work continues on the hotfix. We've had to upgrade a few more components of the game engine in order to move forward with MacOS compatibility, as well as fixing an inconsistency introduced in the modding API by the new Unity version. If you run the game on MacOS (any version), we would really appreciate if you could give the test branch a play. Modders should try recompiling their mods against the new version (details below) as well. Thank you so much!

Hotfix Changes:

  • Updated .net Runtime and API to 4.X
  • Remaining MacOS notarization issues have been resolved.
  • Windows Vista will no longer be supported.
  • MacOS builds now automatically choose between Metal and OpenGL graphics, this should prevent the fullscreen glitches on Catalina
  • Fixed bug where wires could not be drawn starting over the ports on Transformers
  • Fixed crash when multiple Pokeshells were looking for eggs to guard.

Modding Changes

From this point forward Mods will have to be compiled against the new libraries (adjusting the framework version to 4.0 in your project). Mods that have already been compiled and uploaded appear to be working correctly, though normal changes to the game may have broken some mods for normal reasons.


What is open testing?

"Open testing" means players get to test-drive new content early and give us feedback and suggestions before it goes live. Because this is an unfinished and in active development version of the game, it's pretty likely you'll encounter bugs, crashes or balance issues while playing these builds. We'll try to fix any problems that crop up as quickly as we can, but it's possible you'll lose progress in your games while playing on the Testing branch.

Regarding performance, the Testing branch has additional debugging tools enabled to help us track down crashes. This makes the game run more slowly than the live version of the game.

Please also be aware that once a save is loaded in the Testing branch, it cannot be reopened again in the previous Live branch or previous builds.

What do I do if I find a crash or a bug?

Post it up on the Bug Tracker and we'll fix it as soon as we can. If you can attach a copy of your save file to your report, that helps us even more as we can pinpoint the source of problem more quickly.

Do I have to play the open testing build?

Nope! If you'd prefer to only play a stable build, you can continue to play in the current Default branch until the game launches in full. Playing the Open Testing build isn't necessary, but it helps us a lot to receive your feedback and reports - if you're interested, try it out!

How do I become an open tester?

There's no sign up or registration for becoming an open tester. If you own Oxygen Not Included and want to join the Testing Branch, all you have to do is play the Open Testing build on Steam.

How do I play the open testing build?

You can switch your branch on Steam using the instructions below:


How to change branches in Oxygen Not Included (Steam)

  • In Steam, click on Library > Games.
  • Scroll down to Oxygen Not Included.
  • Right-click and select Properties.
  • Go to the BETAS tab.
  • In the dropdown, select the name of the branch you want to play. In this case, the branch name is "testing"
    • This branch does not require a password.
  • In that same Properties window, go to the Local Files tab and press "Verify Integrity Of Game Cache."
  • Your game will be updated to the the previous branch.
  • Launch and play Oxygen Not Included

You can join in the Discussion Topic here.
If you run into a bug, please visit the Klei Bug Tracker.