Corruption is unavoidable in the Drakalor Chain for any PC who wants to make progress in the game. It is a background process that happens as a result of the chaos gate at the bottom of the Caverns of Chaos being open. Some locations remain free of corruption despite the gate being open, notably those near the surface of the Drakalor Chain. In order to get anything done, however, the PC must descend into corrupting areas. It is only a matter of time after that until the first corruption occurs. After ninety days of game time elapses, corruption becomes more rapid. After the gate is closed, background corruption ceases, which is nice if the PC wants to play tourist for a while. However, corruption can still be caused by artifacts that corrupt (section 0.10.3.3) as well as corrupting hits from monsters (section 0.10.3.2).
Note that the possible corruptions occur in random order (not the order listed on this page) which is decided at the beginning of the game. However, if one or more corruptions are removed, the RNG is reseeded and the corruptions will reoccur in a new random order.
Edward Schwank contributed the following regarding corrupting and non-corrupting zones to the newsgroup:
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Corruption radiation and corruption radiation free zones
Corruption radiation-free areas (Locations that do not gradually corrupt the player through corruption radiation):
Uninteresting Dungeon (UD)
Dusty Dungeon lvls 1-2
Village Dungeon
Druid Dungeon
Puppy Cave
Caverns of Chaos lvls 1-9
Infinite Dungeon lvls 1-9
Wilderness
Gremlin Cave
Dwarven graveyard
Water dragon cave
Greater White Unicorn Glade
Terinyo
Lawenilothehl
High Mountain Village
Old Barbarian's Glade
Mad Minstrel's clearing
Corruption radiation areas (As long as the chaos gate is open):
Assassin's guild (Dusty Dungeon lvl 3)
Caverns of Chaos lvls 10+
Infinite dungeon lvls 10+
SMC (after 90th day)
Tomb of the High Kings
Darkforge
The Rift
The Sinister Library of Niltrias
Scintillating Cave (except for the last level)
Tower of Eternal Flames
The Pyramid (uncertain if permanent or not)
Minotaur Maze (uncertain if permanent or not)
The Quickling Tree (uncertain if permanent or not)
Greater Black Unicorn Glade (uncertain if permanent or not)
Ancient Stone Circle (uncertain if permanent or not)
Permanent corruption radiation areas:
Emperor Moloch's lair (last level of Scintillating Cave)
MaLaKaI's lair (approximately level 66 of the Infinite Dungeon)
Palace of Andor Drakon
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This is Edward Schwank's list as posted. MaLaKaI's lair was changed from level 75 to level 66 of the ID. The Pyramid was also changed to a corruption zone. Even the first room in the Pyramid causes corruption.
The following is a complete list of corruptions for g16p2 along with some comments about their effects and workarounds:
A - You are surrounded by an unholy aura (Ch: -10, DV: +6).
This causes monsters to become afraid of the PC at more or less random times. In their frightened state, they will flee. A very nasty side effect is that shopkeepers become homicidally enraged at PCs that enter shops with this corruption, fearing that their customers will be frightened away.
B - You rage (DV: -9, +6 melee damage)!
Mediocre increase to damage in exchange for losing nine points of DV. Not a very good bargain, especially for low level characters, since this will make them easier to hit (and some monster hits cause further corruption).
C - Poison drips from your hands.
Some players hate this corruption more than any other. PCs with this corruption poison any monsters they engage in melee (a nice effect), turn any potion they touch into poison (very bad) and curse any food they touch (very bad). It can result in starvation quickly. The workaround is to wear thick gauntlets, which negate all of the above effects. Alchemistic gloves also can negate these effects when picking up potions or food items, but it is not guaranteed. However, alchemistic gloves *never* block the effects when drinking potions or eating food.
D - You have grown thorns (3d3 melee damage, Dx: -2, Ap: -3).
The extra melee damage occurs only when fighting unarmed. Useful for Monks and Beastfighters, Necromancers using Shadow Touch. Useless waste of 2 Dx points for all others.
E - Your close attunement to corrupted astral space allows teleportation.
Very, very nice if the PC has teleport control. Very, very annoying if the PC doesn't have teleport control.
F - You have grown a bulging cranium (Le: +6, Wi: +4, Ap: -6, PV: -4, To: -3).
Nice learning and willpower increases. PV goes down because the PC's inflated skull is thinner, making it easier to damage? Not good for looks or toughness either.
G - You are a living mana battery.
Another nominee for the most hated corruption. All wands the PC touches are drained of their charges. This does not destroy them; their final charge can still be wrenched from them, but extremely annoying nonetheless. There is no workaround. As a (very small) side benefit, every time the PC drains a wand, power points are added to the PC's power score: blessed wands give +2, uncursed +1 and cursed 0.
H - You have grown horns (+3 melee damage, Ap: -4).
Melee damage in exchange for Appearance.
I - Your antennae explore the details of your environment (Ap: -4).
Kicks in quasirandomly to reveal a bit of the dungeon layout in the PC's immediate vicinty. Loss of Appearance.
J - Your skin is covered by tough scales (PV: +8, Dx: -6, Ap: -4).
Nice PV increase, nasty Dexterity decrease. More loss of Appearance.
K - You have grown a total of 12 eyes (Ap: -6, Pe: +6).
Nice Perception increase, still more loss of Appearance. Getting the idea? By the endgame, PCs tend to get *ugly*. ;-)
L - You exhale sulphur (Ch: -4).
This enables the PC to spit a corrosive acid much the same as a Drakeling's racial ability.
M - You look somewhat apish (St: +3, Le: -1, Wi: -1, Ch: -2, Ap: -3).
This is a unique corruption. Its effects are cumulative over time, so the PC keeps gaining Strength while losing Learning, Willpower, etc. The game notifies you when this is happening with the phrase "You suddenly remember your ancestors." Nice for fighter types, nasty for spellcasters.
N - Your corrupted tissue seems to heal much faster.
The healing rate is increased, but the process leaves scars which reduce both Dexterity and Appearance by one point for each scar. Nasty over time.
O - Your feet have been transformed into hooves (+8 kicking damage, Dx: -6).
Nasty loss of Dexterity, especially since most PCs aren't kickers anyway.
P - You have become extremely thin and nimble (1/2 weight, DV: +6).
Very nice corruption, probably the best. Six points of DV with no downside. This is one of the corruptions needed to enter the quickling tree.
Q - Your muscles have stiffened slowing you down (base action cost: 1500 energy points; PV: +4, St: +2).
Another hated corruption. Slows down all your movement by 1.5X.
R - You have become very light (1/10 weight, St: -6, Dx: +4, To: -6, Ap: -6, +20 speed).
Bad Strength and Toughness losses in exchange for speed and Dexterity. And yes, more appearance loss. This is the other corruption needed to enter the quickling tree.
Becoming corrupted beyond this point turns the PC into a chaos creature and the game ends at that point. All those purple 'j's are probably former adventurers.
The game keeps track of corruption with a numerical value which increases as the PC spends time in corrupting zones or for any of the reasons listed below in section 0.10.3. Note that there are 18 corruptions listed above. For each 1000 "points" of corruption, the PC gains one corruption. Simple arithmetic shows that 180 points equals 1% corruption and the PC gains a new corruption each time he passes a multiple of 1000/180 = 5.556%. This is a strict rule only up to 99% corruption. The 99% corruption level begins at 99 * 180 = 17820 corruption points, but the PC is given extra leeway at this point and does not transform into a chaos creature until the counter is over 19000 points.
0.10.2 Removing corruptions
There will be a time when your PC wants to remove a corruption. Some corruptions are very troublesome and worth getting rid of immediately. Later in the game, removing corruptions may be necessary simply to extend the life of the PC. Whatever the reason, a thorough knowledge of how to remove corruptions should be part of every experienced player's repertoire. There are several ways of doing this as outlined below. Corruption removal items are among the most precious in the game. They should always be blessed unless the PC is trying to specifically remove only one corruption that is impossible to deal with (poison hands can be impossible to deal with without thick gauntlets) while preserving others (for instance one needed to enter the quickling tree).
0.10.2.1 Potions of cure corruption
Potions of cure corruption are exactly what the name implies - they remove corruption, approximately 0.6 corruptions for each blessed potion of cure corruption the PC drinks. A potion of cure corruption is also a quest object for Gaab'Baay.
0.10.2.1.1 Obtaining potions of cure corruption from Guth'Alak
Potions of cure corruption can be obtained from the druid Guth'Alak in Terinyo. He will reward a non-chaotic PC with a potion of cure corruption for delivering a greater chaos creature's or highly corrupted creature's corpse to him. Examples are the corpses of Chaos Orb guardians, Keriax and Keethrax. Black unicorn corpses and greater black unicorn corpses also work. If the PC is chaotic, it is a good idea to sell a chaos creature's corpse to Munxip for safekeeping, then buy it back at a later time when the PC is non-chaotic. It can then be traded to Guth'Alak for a potion of cure corruption.
0.10.2.2 Scrolls of chaos resistance
Blessed scrolls of chaos resistance remove about 1.5 corruptions per reading. There are several places where scrolls of chaos resistance can be obtained: The only absolutely guaranteed location is the hidden room in the High Mountain Village. This will always contain one scroll of chaos resistance. Khelavaster will give six scrolls of chaos resistance to a PC that manages to save him. The dwarven mystic in Dwarftown usually gives four blessed scrolls of chaos resistance to neutral PCs. Finally, the Mad Minstrel will reward a PC who brings him the Weird Tome with five cursed scrolls of chaos resistance.
0.10.2.3 Tracts of order
Tracts are very buggy in g16p2. Avoid them. More will be added here when tracts are working as designed.
0.10.2.4 Yrriur - the Greater White Unicorn quest
Yrriur will remove all corruption *once* as a reward for the PC killing the Greater Black Unicorn - Riurry. It is wise to wait to use this cleansing until it is absolutely necessary. If the PC is doing a normal ending, this should ideally be the last thing the PC does before leaving the Drakalor Chain to insure a corruption-free ending, which leads to better scores and a happier future history for the PC after the game is over.
0.10.3 Gaining corruptions
0.10.3.1 Corruption traps
Corruption traps are as common as any other trap in the dungeons. They cause a slight amount of corruption. They are purple when revealed.
0.10.3.2 Corrupting hits from monsters
Some monsters corrupt by hitting the PC in melee. Common ones include chaos brothers, chaos sisters and the grues found in the elemental temples. Appendix J contains a complete list.
0.10.3.3 Artifacts which corrupt
0.10.3.3.1 Moon Sickle
Moon Sickle is a unique artifact unlike any other in the game. It does not contain the essence of Chaos and Corruption and so does not corrupt merely by carrying it. Likewise, wielding it does not cause corruption. However, successfully hitting a monster with Moon Sickle adds 2d3 corruption points to the PC's corruption counter. Although it has no slaying powers, it is worth considering as a weapon against very difficult monsters for those PCs who have trained polearms, despite its corrupting nature. It has excellent base damage at 10d4+6 and polearms have decent to-hit and to-damage modifiers. Remember, however, that Moon Sickle is autocursing.
0.10.3.3.2 When carried
The following artifacts contain the essence of Chaos and Corruption and will corrupt the PC merely by carrying them:
The Black Tome of Alsophocus
The Amulet of Raw Steel
The Shield of Raw Steel
The Boots of Great Speed
The Sceptre of Chaos
The Medal of Chaos
The Crown of Chaos
0.10.3.3.3 When used
All of the Chaos Orbs fall into this category
0.10.3.4 Potions of raw chaos
Logically enough, if the PC drinks a potion of raw chaos it will cause corruption. They can also corrupt, however, if the PC tries to use them to polymorph an item by dipping it in the potion. There is a chance the PC will spill the potion, which causes corruption.
0.10.3.5 Tracts of chaos
Tracts are very buggy in g16p2. Avoid them. More will be added here when tracts are working as designed.
0.10.3.6 From pools
Drinking from pools may result in the message "You feel corrupted!" Self-explanatory.
0.10.3.7 From corpses
Some corpses will corrupt the PC if eaten. Obvious ones include the corpses of the Chaos Orb guardians. Others include Keethrax, Keriax and chaos animals.
The effects will be compiled here eventually. Until then you can browse Appendix J for corruptions resulting from eating monster corpses.
0.10.3.8 Riurry - the Greater Black Unicorn quest
Riurry will reward the PC with 1 - 2 corruptions for killing the Greater White Unicorn Yrruir.
0.10.3.9 Being crowned a champion of chaos
Being crowned a champion of chaos will cause 2 - 3 immediate corruptions in addition to making further corruption faster.