Various install packages and patch updates with MAJOR chemistry tree problems I deleted my game installs purposely since I have had problems loading the solid rocket A kits into the anti-meteor system between builds 0.240.7 to 1.0. I do not recall anymore if I created a bug report to Pyramid Games. No other help as worked yet when I have asked others. Anyhow...... I am currently at build 1.2.9 used through steam, using Windows desktop, 26H2. No known issues for 26H2 is mentioned for game type errors as of October 27 by Microsoft. I was using windows 25H2 when this chemistry tree problem started happening up to 3 weeks ago. I have encountered this install problem now from versions 1.0, 1.1 and 1.2 (as listed in game versions and beta on Steam) using clean installs or patch updates. I even went back to clean install 0.240.7 (dated November 21, 2025), then a patch update to 1.0, same errors including up to 1.2.9. (There is a version 0.240.7 dated February 3, 2026, last early access before full build 1.0.) I have found the chemistry tree corrupted from the start of a new survival campaign (alpha base not checked) or sandbox colonist difficulty level. I will not be able to play the game to advance much more with the broken chemistry tree issues. Tablet-knowledge-discovered tablets CHEMISTRY - show already received at a brand new games type from versions 1.0 to 1.2 : Water Electrolysis..., Sabatier Process, Waster Recycling..., Silicate Glass Pr.., Thermite Production. Tablet-knowledge-discovered tablets COOKING - show already received at a brand new game type from versions 1.0 only : Vegetable Soup, Baked Potatoes. Any game I play from scratch does not show any new chemistry tablet obtained by me to update the chemistry tree workbench use with a new technology obtained. In the chemistry tree, using silicone purification as an example, it stays grayed. Never goes to red; even though you saw the game interaction add silicon purification to the chemistry tablet section. Can anyone else go back to a new survival campaign and a sandbox start? Tell me what you see, good or bad. Can someone provide me with an offline download installer link offered by the pyramid game occupy mars programmers or steam community administrators if available before this issue is debugged? As well as a pyramid game occupy mars cleanup utility? On the first reinstall: I verified files to be accurate. Same errors as described above, no matter what game type or version 1.0 or newer. Uninstalled game again. Cleared windows desktop local, locallow and any roaming folder information with the game. Deleted remaining steam files from \Steam\steamapps\common\Occupy Mars The Game. Some did not delete from the standard first time windows uninstall procedure. Now they are gone! Deleted occupy mars registry, Computer\HKEY_CURRENT_USER\Software\PyramidGames\OccupyMars. Shutdown then restart. I did 1-6 clean game installs all over again. Trying at version 1.2 or 0.240.7 then doing patches. Repeating steps 1-5, etc. I made sure that cloud sync was off in steam settings after the 1st computer restart and reinstall. Same problems with chemistry tree. No matter what I did. I have kept some other game saves elsewhere on my computer. I will keep these other game saves till November 10, 2026. Perhaps they will help with the software issue I am experiencing. Let me know if you want or do not want the other game save files as soon as possible. After that date mentioned, I am deleting them. I sent this to [email protected] minus the attached save files since I can not attach files within this F4 feedback communication.

Bug

Angry

0.0060556

Yes

1.2.9