Event System

Events occur when stepping on a ”?” tile (Unknown tile) on the map. However, ”?” tiles don’t always result in events — other room types may appear based on a probability table.

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Room Type Resolution for ? Tiles

Room Type	Base Probability	Notes
Normal Combat	10%
Elite Combat	-1% (disabled)	Does not normally occur
Treasure	2%
Shop	3%
Event	~85%	All remaining probability

Event probability is calculated as 1.0 - (sum of all positive non-event probabilities). Initially: 1.0 - (0.10 + 0.02 + 0.03) = 0.85 (85%).

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Probability Accumulation

Probabilities shift each time you step on a ? tile:

1. A random roll is made using the current probability table
2. Selected room type: Probability resets to its base value
3. Unselected room types: Base value is added to their current probability

If a room type is not selected for multiple consecutive ? tiles, its probability gradually increases.

Example: Normal Combat (base 10%) not selected for 3 consecutive tiles:

Count	Combat Probability
Initial	10%
After 1 miss	20%
After 2 misses	30%
After 3 misses	40%

Resets to 10% when selected.

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First Run Special Handling

On a player’s first run, special tutorial-like handling applies:

? Tile Visit	Result
1st	Event (forced)
2nd	Event (forced)
3rd	Normal Combat (forced)
4th+	Normal probability table

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Relic & Modifier Effects

Relics

Relic	Effect
Juzu Bracelet	Normal Combat cannot occur from ? tiles
Golden Compass	All ? tiles in the acquired Act become fixed Events
Planisphere	Heal 5 HP when entering a ? tile (no effect on probabilities)

Modifiers

Modifier	Effect
DeadlyEvents	Sets Elite Combat base probability to 10%. Treasure accumulation rate doubled. Juzu Bracelet removed from relic pool

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Number of ? Tiles on Map

The number of ? tiles is randomly determined during Act generation.

Act	Number of ? Tiles
Act 1 (Overgrowth / Underdocks)	Gaussian: mean 12, std 1, range 10–14
Act 2 (Hive)	Gaussian: mean 12, std 1, range 10–14, minus 1 (result: 9–13)
Act 3 (Glory)	Gaussian: mean 12, std 1, range 10–14, minus 1 (result: 9–13)

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Event Selection Logic

Event Pool Composition

Each Act’s event pool combines:

1. Act-specific events: Events unique to that Act
2. Shared events: 18 events common to all Acts

These are shuffled at Act generation and served in order.

Selection Flow

1. Take the first event from the shuffled list
2. Check IsAllowed() (does it meet occurrence conditions?)
3. Check if already visited (seen during this run?)
4. If conditions not met → move to next event in list
5. If all events exhausted → loop from beginning (duplicates allowed)

IsAllowed() Conditions

Each event can define its own occurrence conditions. Condition types:

Condition Type	Example
Act restriction	Only occurs in specific Acts
Gold requirement	Must have a certain amount of gold
HP requirement	Must have certain HP, or have taken damage
Deck condition	Specific cards or enchantment targets in deck
Relic condition	Specific relics owned/not owned
Pet condition	No event pet owned
Floor condition	Certain number of floors passed
Potion condition	Potions in inventory

In multiplayer, all players must meet the conditions.

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Multiplayer Shared (IsShared)

Each event has a “Multiplayer Shared” flag (code property: IsShared) that controls whether all players experience the event simultaneously in multiplayer. This is a separate concept from shared events (events included in every Act’s pool).

Flag	Behavior
Yes	All players share the same event screen in multiplayer, and choices are decided by vote. The RNG seed is shared across players
No (default)	Each player experiences the event independently. RNG seeds differ per player

Note

“Multiplayer Shared” only has an effect in multiplayer mode. In single-player, this flag makes no difference to gameplay.

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Note: Ascension and Events

Ascension level progression does not directly change event choices or reward values.

However, indirect effects exist:

• DeadlyEvents modifier: Elite Combat can occur from ? tiles
• Map generation changes (fewer Rest Sites, etc.) may alter the relative importance of ? tiles