the next mission (or do not beat it yet), the game allows you to undo those specific recent purchases and spend them elsewhere. Difficulty Adjustment
: Your technology choices are only "locked in" once you finish a mission. If you realize you made a mistake during a mission or while still on the world map, you can exit and re-choose before winning. they are billions reset tech tree
Aris paled. "My Lord, a total Tech Tree reset? The mental strain on the scholars... the loss of current blueprints... it will throw the colony into a structural seizure. We’ll be defenseless while the new schematics are uploaded." They Are Billions: How to Reset the Tech
While you cannot reset your entire history, the game does allow a "grace period" for recent purchases: Aris paled
They Are Billions , the technology tree locks permanently upon completing a mission, offering no native, in-game option to reset campaign choices. Players can, however, use external third-party tools like the TAB-research-tree-reset Steam Workshop mod or manipulate save files to force a reset. Steam Community Technology Tree Progression Guide (Edited)