Radon

Radon is a resource unlocked after beating the Dimension of Rage, a unique map that is created by buying Rage, an upgrade awarded for completing zone 15 in Universe 2 , the Radon Universe. It functions exactly the same as Helium in Universe 1, allowing you to purchase Perks exclusive to Universe 2. Along with Radon the player also unlocks the Portal, which allows for soft-resetting your game. Perks and Radon last throughout Portals. Clearing the Dimension of Rage and using the Portal for the first time in Universe 2 enables the collection of Void Maps in future runs.

## How to get Radon

There are currently five known ways to get Radon:

1. Complete the Dimension of Rage (or use the Portal Generator). This gives 45 Radon, not modified by anything.
2. Kill a Blimp or Improbability, on zone 16 or later, after having completed the Dimension of Rage *at least once* in your save. Blimps that spawn before zone 16 do not drop Radon. All zones after 15 will have a Radon-carrying boss imp.
3. Kill the Cthulimp at the end of a Void map.
4. Kill Mutated enemies in the Mutated zones.
5. Buy Bone Portals in the Bone Trader menu for 100 Bones each, while in the Radon Universe. The Radon awarded corresponds to the highest amount ever obtained in a single run. Unlike Radon from other sources, this Radon can be immediately spent on Perks.

Radon obtained from methods 1-4 appears in the Radon box below Gems. In order to use the Radon on Perks, you need to use the Portal (soft reset). There is also a Rn/hr below this number, which can be used to assess whether your run is efficient (in gaining Radon) or not. *The Rn/hr number keeps track of the total Radon earned in a run over time taken, and does not indicate any sort of passive gain.*

## Rewards

**Note**: You must beat The Dimension of Rage *at least* *once* in your save file to gain Radon from completing zones. If you've completed Zone 16 or above before doing so, the Radon you would have otherwise gotten is lost. This only matters during the first run.

The base amount of Radon received from each zone boss is calculated using the same formula as Helium. This formula is:

R

n
base

=
1.35
⋅
(
z
−
19
)

1.23

1.35
⋅
(
z
−
19
)

where

z

is the current Zone

{\displaystyle Rn\_\text{base} = 1.35 \cdot (z-19) + 1.23^{\sqrt{1.35 \cdot (z-19)}} \, \text{where} \, z \, \text{is the current Zone}}

If z-19 < 0, the z-19 term is set to 0, meaning the base value degenerates to 1.23^0 = 1. For some calculated values, see the table below.

The actual amount of Radon received will be greatly increased by Radon bonuses from Challenge², Condenser Towers, Looting, etc. One can see the Radon breakdown clearly by clicking on the present icon next to the enemy imps and then clicking on the Radon category. The final Radon after base formulas and bonuses is **rounded down**.

Most Radon modifiers are simple multipliers -- for example, Looting is an additive +5% bonus per perk level. However, a few of the bonuses are more interesting.

 Mass Radon Mutator | x1.5 if currentZone > 200

## Void Maps

Clearing a Void Map generally awards **twice** the amount of Radon from killing the boss at the end of each world zone.
The following factors increase the amount of Radon gained from Void Maps:

* Void Specialization I and II, and Master of the Void Masteries
* Scruffy with the Void Map stacking abilities
* Meteorologists hired in a previous zone (those hired in the current zone are not yet active), which increase the amount of Radon earned by 1% (additive). Meteorologists are unlocked each run by clearing cell 20 of zone 30.