Tech tree.

[Taraea]

Here's a quickie tech tree guide. Note that for the Barrier cannon, upgrading either Left or Right allows access to Up or Down.


Heavy I
-Heavy II
--Heavy III -> Heavy IV
--Missile Launcher -> Missile Launcher II
-Impact I
--Impact II -> Impact III
--Ice -> Ice II
-Double Heavy I
--Sonic Pulse I -> Sonic Pulse II

Quick I
-Quick II
--Quick III -> Quick IV
--Flame Thrower I -> Flame Thrower II
-Sniper I
--Sniper II -> Sniper III
--Laser I -> Laser II
-Long Range I
--Long Range II -> Long Range III
--Electric I -> Electric II

Double I
-Double II
--Double III -> Double IV
--Boomerang I -> Boomerang II
--Barrier Down
---Barrier Left
---Barrier Right
----Barrier Up
----Barrier Down
-Double Quick I
--Double Quick II -> Double Quick III
--Machine Gun I -> Machine Gun II
-Triple I
--Triple II -> Triple III
--Poison Spray I -> Poison Spray II

[ybom]

Thanks for the info. Haven't I seen this somewhere before?

[Patashu]

There seems to be an inconsistency in the tree:

Heavy I
-Heavy II
--Heavy III -> Heavy IV
--Missile Launcher -> Missile Launcher II
-Impact I -> Impact II -> Impact III
--Ice -> Ice II

In italics, the next two versions of a turret are pushed onto a new spot, but in bold they are not.

[Tubias]

Impact canons upgrade from a Heavy II tower. Heavy III and Heavy 4 can also upgrade from a Heavy II. 2 different options, impact, or heavier.

[Taraea]

Good eye, Patashu. Fixed that formatting error.

Originally Posted by Tubias

Impact canons upgrade from a Heavy II tower. Heavy III and Heavy 4 can also upgrade from a Heavy II. 2 different options, impact, or heavier.

Impact cannons upgrade from Heavy I, alongside Heavy II.

Quick note: everything in this list was checked with the infinite money version, then re-checked and compared to normal (particularly the Barrier towers, as they don't exist in infinite money).