Kingdom Rush Genesis Upgrades — Planning Your Build After the Patches

The official release description distinguishes individual hero and spell upgrade trees from global tower upgrades that can be retuned between stages. Keep those layers separate when you compare builds or read older advice.

Record the setup before testing

Write down the selected heroes, towers and spells together with the relevant upgrade choices. Record platform, difficulty and game version as well. Without those details, two players may appear to use the same army while actually testing different configurations.

An upgrade guide should explain the problem it is solving. A choice intended for one enemy or mode is not necessarily the best use of resources everywhere.

Change one variable at a time

Our suggested comparison method is to replay a familiar stage with one deliberate change. Note whether the first failure occurs earlier or later, whether a different lane needs attention, and whether the change creates a new weakness.

If you simultaneously change the hero pair, tower loadout and every upgrade, it becomes difficult to know which adjustment helped. A narrow experiment is easier to learn from than a complete rebuild after every loss.

Read current descriptions

Consult the upgrade text in your installed game for exact effects, costs and prerequisites. We have not verified a universal upgrade purchase order or reset cost, and do not list either as fact. Demo-era videos can provide ideas, but their menus and mechanics need to be compared against the release build.

Use the tower roster, hero roster and spell reference to organize your options. For documenting a stage attempt, use the campaign checklist.

What the October patches changed

Two patches reshaped upgrade economics after launch, per Ironhide's changelogs:

• Hero XP curve (Patch 1): level 10 now takes 40% less total XP, and the top spell level needs 25% less. Later unlocks catch up much faster than at launch.
• Skill cost rework (Patch 2): the starting cost of many tower skills dropped, sometimes with more expensive levels II and III to compensate. Examples from the official changelog: Honor the Fallen (Knights Order) is now 125/125/125, Minor Elementals (Sunray Master) 125/125/125, Cursed Bolt (Cursed Crossbows) 100/200/300, and Hay Fever or Gnarly Roots (Ironbark Treant) start at 100 instead of 150.
• Classic Rush on Impossible (Patch 1) now has every tower upgrade active regardless of stage, with ten skills discounted.

The practical consequence: a tower reaches its full kit sooner than it did at launch, so pre-patch purchase-order advice can waste gold. When your notes disagree with the in-game menu, trust the menu — and check the update tracker for the full quoted values.