挑战（Challenges）

**游戏里的描述:**
*Prove your loyalty and dedication to the factions by completing their unique Challenges. You will be rewarded with new perks and upgrades to help in your Realm Grinder progress!*

**所有挑战都需要使用对应的派系解锁**

**所有挑战2都需要使用对应的派系和对应的血脉解锁**

**所有威望派系（Prestige）在挑战3之前会告诉你解锁它们需要使用哪个基础派系，当然，所有挑战也需要此威望派系**

File:ChallengesComplete.PNG
**Challenges** were first implemented in v1.4, *The Secret of the Realms* expansion, bringing new perks to the Vanilla Factions. More challenges were added as new factions appeared. As of v2.5, there are now a total of 46 tier challenges, and 58 rewards.

Upon reaching R2, a "Challenge" tab will appear, there you can see a list of all the available challenges with their unlock requirements. There are several Tier challenges for each faction. They can only be completed in order of tier, as each require the previous one be completed, but you can accomplish multiple tiers on a same run. - You just cannot get later Tiers before earlier Tiers.

Each tier challenge rewards a perk, and completing all the tier challenges of a Faction will reward a spell upgrade.

All challenge rewards are free, and after the faction spell upgrade has been purchased, will be turned on by default. When they are active (!), they can be toggled on and off by clicking on their respective icons, and will remain through soft-resets until turned on again.

Once a challenge has been completed, the perk will be available whenever you are playing as the faction corresponding to the *background* of that challenge. For example, Demons benefit from Demon Challenge 1, but also Goblin Challenge 2, and do not benefit from Demon Challenge 2 (which lacks the red/black background).

## Challenge Clues

These clues are visible in the icons tool-tips of the challenge tab, or as-is if the extended list option is enabled.

## 挑战完成奖励

Final Rewards are all Spell Upgrades, given on completion of all Tier challenges of a Faction. They will be available, and turned on by default, after buying the Faction spell upgrade.

## 解锁需求（依等级排序）

All challenges require to be played as the faction in question, to have all the previous tier challenges of that faction completed, and the additional requirements listed in the following table. Note that unlike artifacts, vanilla challenges can be completed with the prestige factions. 记住: “本次游戏” 意思是点击"abdication"按钮之前。

 Titan
* Reincarnation 25
* Titan Unique Building
* Completion of Titan Challenge 3
*Formula:

r
o
u
n
d
(
0.05
∗
x
)

{\displaystyle round(0.05 \* x)}

  where x is the number of Faction Coins generated by Lightning Strike.*
 Druid
* Reincarnation 25
* Druid Unique Building
* Completion of Druid Challenge 3
 Faceless
* Reincarnation 25
* Faceless Unique Building
* Completion of Faceless Challenge 3
*Formula:

(
0.01
∗
5
∗
0.1
∗

x

0.75

)

{\displaystyle (0.01\*5\*0.1\*x^{0.75})}

  where x is current Hive Mind bonus.*
 Dwarf
* Reincarnation 27
* 2000 Excavations
* Completion of Dwarven Challenge 3
*Formula:

50

x

0.35

%

{\displaystyle 50x^{0.35}\%}

  where x is the number of Knight Jousts and Wizard Towers you own.*
 Drow
* Reincarnation 27
* 2000 Excavations
* Completion of Drow Challenge 3

 Dwarf
* Reincarnation 33
* Dwarven Unique Building
* Completion of Dwarven Challenge 4
***Note:** As of 3.0, players have reported this appears to no longer work towards a number of challenges and upgrades.*
 Drow
* Reincarnation 33
* Drow Unique Building
* Completion of Drow Challenge 4

## Requirements by Faction

All challenges require to be played as the Faction in question, to have all the previous Tier challenges completed, and the followings in the below tables.

 1
* Reincarnation 2
* *Fairy Choir* upgrade
*Formula:

x

1.75

{\displaystyle x^{1.75}}

  where x is amount of Fairy afflicted upgrades.*
 2
* Reincarnation 8
* Fairy Bloodline
* Completion of Fairy Challenge 1
 3
* Reincarnation 18
* Fairy Unique Building
* Completion of Fairy Challenge 2
*Formula:

(
0.1
∗
x

)

0.225

{\displaystyle (0.1 \* x)^{0.225}}

  where x is your Buildings Owned (This Game) stat.*

 1
* Reincarnation 2
* *Sun Blessing* upgrade
Template:MultiplierReduction
 2
* Reincarnation 8
* Elven Bloodline
* Completion of Elven Challenge 1
*Template:PA%*
 3
* Reincarnation 18
* Elven Unique Building
* Completion of Elven Challenge 2

 1
* Reincarnation 2
* *God's Rest* upgrade
 2
* Reincarnation 8
* Angel Bloodline
* Completion of Angel Challenge 1
 3
* Reincarnation 18
* Angel Unique Building
* Completion of Angel Challenge 2

 1
* Reincarnation 2
* *Greed Drive* upgrade
 2
* Reincarnation 8
* Goblin Bloodline
* Completion of Goblin Challenge 1
 3
* Reincarnation 18
* Goblin Unique Building
* Completion of Goblin Challenge 2

 1
* Reincarnation 2
* *True Night* upgrade
 2
* Reincarnation 8
* Undead Bloodline
* Completion of Undead Challenge 1
 3
* Reincarnation 18
* Undead Unique Building
* Completion of Undead Challenge 2

 1
* Reincarnation 2
* *Hell Rush* upgrade
 2
* Reincarnation 8
* Demon Bloodline
* Completion of Demon Challenge 1
 3
* Reincarnation 18
* Demon Unique Building
* Completion of Demon Challenge 2

 1
* Reincarnation 4
* *Lightning Storm* upgrade
* Completion of Angel and Goblin Challenge 1
 2
* Reincarnation 9
* Titan Bloodline
* Completion of Angel and Goblin Challenge 2
* Completion of Titan Challenge 1
 3
* Reincarnation 19
* Completion of Angel and Goblin Challenge 3
* Completion of Titan Challenge 2
* 1000 Excavations
*Formula:

r
o
u
n
d
(
2.5
∗

log

10

⁡
(
1
x
)
)
%

{\displaystyle round(2.5\*\log \_{10}(1+x))\%}

  where x is your Faction Coins Gained (This Game) stat.*
 4
* Reincarnation 25
* Titan Unique Building
* Completion of Titan Challenge 3
*Formula:

r
o
u
n
d
(
0.05
∗
x
)

{\displaystyle round(0.05 \* x)}

  where x is the number of Faction Coins generated by Lightning Strike.*

 1
* Reincarnation 4
* *Halls of Balance* upgrade
* Completion of Elf and Demon Challenge 1
*Formula:

f
l
o
o
r
(
(

(
1
16
∗
x
)

−
1
)

/

2
)

{\displaystyle floor((\sqrt{(1 + 16 \* x)} - 1) / 2)}

  where x is your Playtime (This Game) stat in hours.*
 2
* Reincarnation 9
* Druid Bloodline
* Completion of Elf and Demon Challenge 2
* Completion of Druid Challenge 1
 3
* Reincarnation 19
* Completion of Elf and Demon Challenge 3
* Completion of Druid Challenge 2
* 1000 Excavations
 4
* Reincarnation 25
* Druid Unique Building
* Completion of Druid Challenge 3

 1
* Reincarnation 4
* Faceless Overmind upgrade
* Completion of Fairy and Undead Challenge 1
 2
* Reincarnation 9
* Faceless Bloodline
* Completion of Fairy and Undead Challenge 2
* Completion of Faceless Challenge 1
 3
* Reincarnation 19
* Completion of Fairy and Undead Challenge 3
* Completion of Faceless Challenge 2
* 1000 Excavations
*Formula:

f
l
o
o
r
(
2
∗

x

0.5

)

{\displaystyle floor(2 \* x^{0.5})}

  where x is your Royal Exchange Bonus.*
 4
* Reincarnation 25
* Faceless Unique Building
* Completion of Faceless Challenge 3
*Formula:

(
0.01
∗
5
∗
0.1
∗

x

0.75

)

{\displaystyle (0.01\*5\*0.1\*x^{0.75})}

  where x is current Hive Mind bonus.*

 1
* Angel Faction
* Reincarnation 6
* *Minedwarf* upgrade
* Completion of Elven, Angel and Fairy Challenge 1
*Formula:

ln
⁡

(
1

G

1

A
10

)

20

%

{\displaystyle {\frac {\ln {(1+G^{1+{\frac {A}{10}}})}}{20}}\%}

 where G is the number of gems you own and A is the number of times you ascended.*
 2
* Fairy Faction
* Reincarnation 11
* Dwarven Bloodline
* Completion of Elven, Angel and Fairy Challenge 2
* Completion of Dwarven Challenge 1
Template:MultiplierReduction
 3
* Elf Faction
* Reincarnation 21
* 1750 Excavations
* Completion of Elven, Angel and Fairy Challenge 3
* Completion of Dwarven Challenge 2
 4
* Reincarnation 27
* 2000 Excavations
* Completion of Dwarven Challenge 3
*Formula:

50

x

0.35

%

{\displaystyle 50x^{0.35}\%}

  where x is the number of Knight Jousts and Wizard Towers you own.*
 5
* Reincarnation 33
* Dwarven Unique Building
* Completion of Dwarven Challenge 4
***Note:** As of 3.0, players have reported this appears to no longer work towards a number of challenges and upgrades.*

 1
* Demon Faction
* Reincarnation 6
* *Perfect Combo* upgrade
* Completion of Goblin, Demon and Undead Challenge 1
 2
* Goblin Faction
* Reincarnation 11
* Drow Bloodline
* Completion of Goblin, Demon and Undead Challenge 2
* Completion of Drow challenge 1
*Formula:

l
o

g
2

(
1
x
)

{\displaystyle log^2(1 + x)}

  where x is your Faction Coins Gained (This Game) stat.*
 3
* Undead Faction
* Reincarnation 21
* 1750 Excavations
* Completion of Goblin, Demon and Undead Challenge 3
* Completion of Drow challenge 2
 4
* Reincarnation 27
* 2000 Excavations
* Completion of Drow Challenge 3
 5
* Reincarnation 33
* Drow Unique Building
* Completion of Drow Challenge 4

## Tips

This section provides tips, hints and potentially spoilers on how to complete the various challenges.

* **Fairy 1:** Do excavations to quickly get the Fairy Heritage upgrade. Don't forget the Fairy Choir spell upgrade.
* **Angel 1**: Recommended +1 B (1E9) gems. ~~You will need a min mana regen of 60 m/s~~ to get enough Holy Light casts. Avoid purchasing Angelic Dominance (3,2). If you have bloodlines (R7), choose the Druid Bloodline. — "Daytime" is considered to be from 6 AM to 6 PM on your system clock. (source)
* **Undead 1:** Requires at least 11h, 6m, 40s playtime, and there are no perks that could reduce it. You also need to have the True Night spell upgrade, but you do not need the Undead heritage, nor have it unlocked. It is easier to do this at R16 along with unlocking time-gated research D25.
* **Goblin 1:** While Green Fingers Discount says it works offline, it does not work in the same way as online, and this challenge cannot be completed offline or when coming online based on the offline effect of GFD. The challenge can be attempted in multiple tabs simultaneously, but GFD randomness is decided when the upgrade is bought, and if you are using multiple tabs, be sure to import / load the save before buying the upgrade.
* **Demon 1:** Ruby power, scrying, and challenge rewards are allowed. It is easier to do this at R7+ using the Elven bloodline.
* **Titan 1:** Since RG v2, this can be done solely with building assistants (You get 1 assistant for each 5th and 25th building upgrades). Avoid Reincarnation power, Undead & Drow bloodline, and Undead 3 challenge. By precaution, don't even get the other assistant upgrades. At lower Rs, it is easier to do it with the minimum required 13 assistants. Check your stats regularly and when you get close to the required 169 total REs, switch to buying them one by one - careful to not over-buy! Remember you can have more than 13 assistants so long as you have the required multiple of 13\*(#assistants) REs. (eg.: 26 assistants => 338 RE)
	+ Note that it requires 13\*(#assistants) total, not 13\*(#assistants) for each faction. For example, if you had 13 assistants, you would need 169 exchanges total, not 169 Fairy exchanges + 169 Elven exchanges etc etc.
	+ Using Ruby Power if you have bought bonus Assistants will cause the challenge to bug out and become impossible to complete.

* **Druid 1:** Make sure your least-producing building still makes up a large proportion of your production (2% and up). This will necessarily balance the production of each of your other buildings around 9.09% (= 1/11). Upgrade buildings only when you need to balance them. Building more Farms, Inns and Blacksmiths will increase the multiplier of the final Grand Balance cast.
* **Faceless 1:** Beware of using Ruby or Reincarnation power. Also make sure to disable the Undead 3 Challenge bonus. *Avoid the building upgrades other than Hall of Legends, since they now add assistants as well.*

* **Elf 2:** Autocast Moon Blessing and pick Elven Bloodline and this will complete in ~55 minutes if you have the mana to sustain it (35/sec).
* **Angel 2:** You have to use the Angel faction with the Angel bloodline (Merc won't work because of the requirements). Use bronze autocast for all spells. Dwarven Pickaxe is another spell, so make sure to get it. If you have R16 with Spiritual Surge, this will take ~55 minutes.
* **Demon 2:** High gem and low Excavations (relative). Work up enough coins to excavate 95 REs, and then buy 1 or 2 more to get exactly 666. Don't buy Demon exchanges. Drow's blackmail upgrade helps the challenge, and the exchanges don't have to be spread evenly.
* **Titan 2:** This challenge does not need to be done within one spell combo. In addition, due to a bug, it counts one click per second if you have at least one assistant. It's possible to meet the condition without clicking at all: while spells are active cast 3 spells that last 20 seconds together 4 times.
* **Dwarf 2:** To complete this at the end of R11, you need a lot of Faction Coins. If you have already excavated a lot, wait for the end of the next reincarnate, keep excavations low this time. Get Dwarf bloodline, Fairy faction, then excavate, buy all heritages and exchanges. Alternate between maxing buildings and upgrades. Cast a Fairy Chanting + Call to Arms combo right before the two minute limit. Don't forget Dwarven trade treaty!
	+ See this post on the Steam forums for a step-by-step guide
* **Dragon 2:** As for the reward's spell tier reduction, the formula implemented in the game is: *`max(0,(1 - (x / 28)9)), where x is GB time in days`.* The cost of tiers are multiplied by it, so if it yields 0.1, that's a 90% reduction. Here's a plot of the function. It goes from 0% reduction to 100% reduction over the course of 28 days of GB time. (Source: Comment reply by Pseudobyte)

* **Fairy 3:** Use Goblin Bloodline.
* **Demon 3:** Use Goblin Bloodline, can be easily done around Uvg gems.
* **Druid 3:** Now that Grand Balance affects 0 buildings, it will target the next building down the list:
	1. Buy Max Farms, Max Inns, Max Blacksmiths, and Max Deep Mines. > Cast Grand Balance
	2. Buy Max Stone Pillars and Max Alchy Labs > Cast Grand Balance
	3. Buy Max Monasteries, Max Labys, and Max Iron Strongholds > Cast Grand Balance.
* **Dwarf 3:** Use the Elf bloodline and this is pretty much automatic.

* **Druid 4:** You need at least 50 m/s, and to start autocasting GB within approximately 59 seconds of game start, as you are only required to start the 13th cast within the time limit, not finish it. Take Druid bloodline, remember not to buy Halls of Balance, and it should be trivial. If you cast manually instead of autocasting, you can shave off a couple of seconds total, as autocasting takes a whole second to cast again after a spell runs out. Can also be done with Elven bloodline: Abdicate, Pick Elven Bloodline, Buy all, Neutral faction, Buy all, Pick druid faction. Cast first GB. Don't forget to buy buildings in between. Don't buy HoB, but purchase heritages and upgrades individually. With elven bloodline you can cast the first GB much faster and you can purchase druid upgrades and heritages faster, which gets you close to 50 m/s, which is enough.
* **Faceless 4:** This is the equivalent of about 8.5 days of time spent allied with Faceless. Getting the Titan Tier 2 challenge *Harmony of Thoughts* will help increase your Faceless playtime.
* **Titan 4:** Buy Olympian Halls, generate as much mana per second from non-Research methods (mostly Heritages), set Lightning Strike on bronze (Ctrl+Shift) - Then wait. On average, it takes 132\*\* strikes to get the two-in-a-row strikes. The Realm Weather Service tool can help forecast strikes.\*\* The theoretical average is 132, my experimental average was more like 135, which may be due to the small statespace of the PRNG used by Realm Grinder. It is true that the odds of any two particular strikes both being on Olympian Halls are 1/121. That does not imply that it takes 121 casts on average because the pairs of casts are not statistically independent. At 20 seconds per cast, using Druid bloodline to have LS cast immediately after finishing, and averaging 132 casts, this challenge may only take approximately 44 minutes.
* **Dragon challenges** : general advice by artcrow
* **Dragon 4:** Suggested Faction to use is Faceless (build by artcrow: build by eatnsleep)

## Links

* Tier Challenges sortable table
* R2 - R25 Challenge Guide at Kongregate Forums - by Endenligh
* Prestige Challenges at Kongregate Forums - by Rahler

## References

1. ↑ *The Neutral challenges were added in patch v1.5.45; the Prestige in v.1.6.52; and Dragon in v2.5.0.0*
2. ↑ *There are in total 46 tier challenges, and 58 rewards: 3x6 for Vanilla Factions; 4x3 Neutral; 16 Prestige; and the 12 final rewards.*
3. ↑ *Looking at the tier challenge rewards, you can notice patterns such as:
The first tier upgrades boost their own faction.
The last tier upgrades are always universal upgrades.
Tier 2 and 3 upgrades boost an other Faction of the same Vanilla, Neutral, or Prestige alignment.
Dwarf & Drow tier 2 and 3 boost a Vanilla faction of the same Good or Evil alignment.
All Prestige faction tiers boost their own faction.
Etc. - See sortable table of Tier Challenge rewards.*
4. ↑ *You must play the faction in question to get the perk active, and be able to turn it on and off again.*
5. ↑ 5.0 5.1 *All last tier challenge rewards are universal: They work with all the factions, including Mercenaries.*