The upgrade menu when a level is completed
The upgrade menu found within the achievements menu.
Note: This page is about the legacy upgrade system. For the new upgrade system on mobile, see Class Upgrades.
Global upgrades (not to be confused with Unit Upgrades) are a system of boosts exclusive to the flash version of the game, which affect many parts of gameplay.
Usage[]
Global upgrades can be purchased with upgrade points obtained from completing a level for the first time and finishing achievements. The upgrade menu can be accessed at the end of a level or through the achievements menu.
It takes a total of 30 upgrade points to max out all upgrade options. Half of these upgrades can be acquired by playing all the levels. The other half come from getting any of the eighteen achievements. There are six different upgrades options available for purchase.
Options[]
Unit Capacity[]
Fully upgraded unit capacity
The unit capacity upgrade increases the maximum unit limit by up to 10 units. This is the only other way to increase the unit limit aside from spending gold. Because of the limited number of units allowed, this upgrade should be a priority as it effectively increases the maximum killing power of a base
| Level | +X Unit Limit |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 8 |
| 5 | 10 |
Healing Increase[]
Fully upgraded healing increase
The healing upgrade increases the amount of damage that healer units such as the Vira Healer and Sanctum Beacon heal by up to 25%. This upgrade is extremely useful in later levels due to the massive amounts of damage that enemeis deal. It is also essential in higher difficulties. However, when the Vira Ultima becomes available this upgrade becomes less useful thanks to the instant healing abilities of the Vira Ultima.
| Level | +X% Healing |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 5 | 25 |
Attack Power Increase[]
Fully upgraded attack power increase
The attack power upgrade is identical to the healing upgrade, with the exception that it boosts the damage of all units by up to 25%. Out of all upgrades available this is the only one that can directly increase the damage output of your units. This upgrade is useful at any time, but should be maxed out after the unit limit and discount upgrades.
| Level | +X% Attack Power |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 5 | 25 |
Free Fion Drones[]
Fully upgraded free Fion Drones
| Level | +X Free Fion Drones |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 2 super |
Unit Upgrade Discount[]
Fully upgraded unit upgrade discount
The unit upgrade discount reduces the cost to upgrade a unit on the field. Early in the game, this upgrade is semi-useful for reducing the cost of upgrading a unit. In the end game where units such as the ZAC Assimilator cost millions of gold to upgrade, the discount upgrade can make the task of upgrading a unit much easier. Because of the limited usefulness early on, it is recommended you upgrade this later on when it will become more useful.
| Level | -X% Unit Upgrade Discount |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 5 | 25 |
Spell Cooldown Decrease[]
Fully upgraded spell cooldown
| Level | -X% to Spell Cooldowns |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 20 |
| 5 | 25 |