If you are stuck and do not want to restart the entire campaign, the community has developed unofficial tools to modify save files: TABRTreset Tool : A popular community-made utility designed specifically to reset research trees on Steam and other versions. Cheat Engine / Trainers : You can use external software like Cheat Engine
This resets Survival Mode progress – tech points, best scores, unlocked maps. they are billions reset tech tree
: You can undo recent technology purchases only if you have not yet started a mission or if you have failed a mission immediately after making those choices. Once you win a mission, all preceding tech choices are locked in. If you are stuck and do not want
Because no official reset exists, players use these manual methods: Once you win a mission, all preceding tech
Players should treat the "Undo" button as a tactical asset. It allows for " renting" technologies for specific defense phases and reallocating those resources for different unit compositions in the late game.
: Proactive players often create manual backups of their save files before spending large amounts of points. If a chosen path proves non-viable, they can revert to the older save.