Tech tree planner
Tick the upgrades you want. Every prerequisite is added for you, with the total cost of the plan and whether it unlocks enough to open each tier.
How this works: each upgrade's cost and prerequisites come from the game's tech tree. A tier opens once you have unlocked enough upgrades (tier 2: 12, tier 3: 30, tier 4: 50, tier 5: 65), and every upgrade counts as one unlock, so the unlocks that open a tier have to come from the tiers below it.
Your plan
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