Trap Types — Classic Dungeon Traps¶

This guide covers 10 ready-to-use trap configurations built from TrapDoorTrap and ProjectileTrap. Each type describes what the player sees, what happens, the prefab structure, every Inspector field, and how to wire things together.

Before you start

Read Setup Guide — Pit & Trapdoor first — it explains the prefab hierarchy, TrapMarker, and the Animator step by step.

Type 1 — Open Pit¶

What happens: The player sees a hole in the floor. They walk in and die instantly.

The simplest possible trap. No TrapDoorTrap component needed — the geometry and cell type do all the work.

Setup:

In the Dungeon Generator, mark the cell as TrapDoor.
Place the pit mesh (hole, walls on all sides, walls going down).
Add no components — done.

The party walks in and falls immediately. No animation, no sound.

Type 2 — Timed Trapdoor¶

What happens: The player steps onto what looks like a normal floor tile. After a moment the hatch opens beneath them and they fall. The hatch can also be closed again by a lever.

The classic hidden trap — the player has no idea it's a trap until it's too late.

Prefab hierarchy¶

TrapDoor              ← root: TrapMarker + TrapDoorTrap
└── TrapMesh          ← closed hatch mesh (looks like a floor tile) + Animator

Animator — states¶

Open the Animator window (Window → Animation → Animator). Create four states:

Idle_Closed    ← default state — hatch looks like a normal floor tile
Opening        ← hatch swings open animation
Idle_Open      ← hatch is open, pit is visible
Closing        ← hatch swings shut animation

Set Idle_Closed as the default: right-click it → Set as Layer Default State. It will turn orange.

Animator — parameters¶

In the Parameters tab (top-left of the Animator window), click the + button and add two Triggers:

Name	Type
`Open`	Trigger
`Close`	Trigger

Animator — transitions¶

To create a transition: right-click the source state → Make Transition → click the destination state. A white arrow appears. Click the arrow to select it and configure it in the Inspector.

Transition 1: Idle_Closed → Opening

This fires when the trap opens (player steps on it or lever pulls it).

In the Inspector for this transition:

Setting	Value
Has Exit Time	❌ off
Transition Duration	0
Transition Offset	0

In the Conditions list, click + and set:

Parameter	Value
`Open`	(just select the trigger — no value needed)

Transition 2: Opening → Idle_Open

This fires automatically when the opening animation finishes playing.

In the Inspector for this transition:

Setting	Value
Has Exit Time	✅ on
Exit Time	1.0 (full clip plays before transitioning)
Transition Duration	0

Leave the Conditions list empty.

Transition 3: Idle_Open → Closing

This fires when a lever closes the hatch.

In the Inspector for this transition:

Setting	Value
Has Exit Time	❌ off
Transition Duration	0
Transition Offset	0

In the Conditions list, click + and set:

Parameter	Value
`Close`	(just select the trigger)

Transition 4: Closing → Idle_Closed

This fires automatically when the closing animation finishes playing.

In the Inspector for this transition:

Setting	Value
Has Exit Time	✅ on
Exit Time	1.0
Transition Duration	0

Leave the Conditions list empty.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	✅
Trigger Delay	0.8–1.5 s
Damage Preset	InstantKill
Permanent	✅
Trigger Once	✅
Enemies Can Fall	✅ (enemies walk into the open hole and die) or ❌ (enemies path around it)
Trap Animator	drag the `Animator` component from `TrapMesh` here
Open Trigger	`Open`
Close Trigger	`Close`

No lever needed for the auto-trigger to fire. The Close trigger is used only when a lever closes the hatch externally — see Type 3 for lever wiring.

Tip

The longer the Trigger Delay, the more sadistic the trap — the player hears the hatch creak and knows what's coming but can't step back in time.

Type 3 — Lever-Controlled Trapdoor¶

What happens: The player is standing on a hatch. Someone (or the player themselves) pulls a lever — the hatch opens and they fall. Pulling the lever a second time closes the hatch again.

Prefab hierarchy¶

TrapDoor              ← root: TrapMarker + TrapDoorTrap
└── TrapMesh          ← hatch mesh + Animator

[somewhere on a wall]
WallLever             ← WallLever (TriggerSource)

Animator¶

Identical to Type 2 — all four states (Idle_Closed, Opening, Idle_Open, Closing), both triggers (Open, Close), all four transitions with the same settings.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	❌
Require Party On Cell On External Trigger	✅ (lever only fires if the party is standing on the hatch)
Trigger Delay	0.2 s
Damage Preset	InstantKill
Permanent	✅
Trap Animator	Animator from TrapMesh
Open Trigger	`Open`
Close Trigger	`Close`

Connecting the lever¶

Select the GameObject with WallLever.
In the Inspector, find the Targets list.
Click + and drag the GameObject that has TrapDoorTrap into the slot.

First pull → lever activates → OnTriggered → Open trigger fires → hatch opens.
Second pull → lever deactivates → OnReleased → Close trigger fires → hatch closes.

Tip

Place the lever in the same room as the hatch — the player has to decide whether to stand on the hatch and pull, or investigate first.

Lever nie reaguje — zaznacz Interact From Adjacent Cell

Na WallLever w Inspektorze zaznacz ✅ Interact From Adjacent Cell. Drużyna zawsze stoi przed ścianą (na sąsiedniej komórce), a nie na niej — bez tej opcji lever nie odpowie na kliknięcie niezależnie od odległości od klapy.

Type 4 — Lever Puzzle (Cycling Hatches)¶

What happens: Several hatches block the path. A single lever toggles their state — each pull opens and closes a different combination. The player must find the combination where all hatches on the path are closed and cross safely.

Setup¶

Use one WallLever (toggle). In the lever's Targets list, add all TrapDoorTrap components.

Give each hatch a different Trigger Delay so they open in sequence, not all at once:

Hatch	Auto Trigger	Require Party	Trigger Delay	Permanent	Trigger Once
Hatch A	❌	❌	0 s	❌	❌
Hatch B	❌	❌	0.3 s	❌	❌
Hatch C	❌	❌	0.6 s	❌	❌

Lever activates → hatches open one by one. Lever deactivates → they close. The player toggles the lever and watches the rhythm to find the safe crossing window.

Note

Permanent = false and Trigger Once = false on every hatch — without this they lock open on the first trigger and won't reset.

Animator¶

Each hatch: all four states + both triggers + all four transitions — identical to Type 2.

Type 5 — Logic Gate Puzzle (Multi-Lever Lock)¶

What happens: Three levers control one or more hatches. The hatch opens only when all three levers are in the wrong position — the player must find the one safe combination.

Setup¶

Create an empty GameObject and add a TriggerLogicGate component (type: AND).
Connect all three WallLever components as inputs to TriggerLogicGate.
Connect the TriggerLogicGate output to TrapDoorTrap.

The hatch opens when all levers are active simultaneously. Every other combination is safe.

Invert the logic with a NOT or NOR gate — the hatch starts open and closes only when the player finds the correct combination.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	❌
Require Party On Cell On External Trigger	✅
Permanent	❌
Trigger Once	❌

Type 6 — Pressure Plate Trap¶

What happens: The player stands on a pressure plate — a hatch somewhere else opens. When the player steps off, the hatch closes. The classic "hold the plate to cross" — but the plate opens the hatch under a different player.

Setup¶

Wire PressurePlate → Targets → TrapDoorTrap.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	❌
Require Party On Cell On External Trigger	✅
Trigger Delay	0 s
Permanent	✅
Trigger Once	✅

Animator¶

All four states + both triggers + all four transitions — identical to Type 2.

Player steps on plate → hatch opens. Next time anyone walks over the hatch → they fall.

Type 7 — Repeating Pit¶

What happens: The hatch opens under the player, they fall and die. A few seconds later the hatch closes and resets — ready for the next victim.

Useful in corridors the player must travel through multiple times.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	✅
Trigger Delay	0.3 s
Damage Preset	InstantKill
Permanent	❌
Close Delay	3 s
Trigger Once	❌
Trap Animator	Animator from TrapMesh
Open Trigger	`Open`
Close Trigger	`Close`

Animator¶

All four states + both triggers + all four transitions — identical to Type 2.

Sequence: party steps in → after 0.3 s hatch opens → party falls → after 3 s Close trigger fires → hatch closes → reset.

Type 8 — Crossbow Corridor¶

What happens: The player enters a corridor, triggers a pressure plate, and an arrow fires from the wall.

No hatch involved — just ProjectileTrap + PressurePlate.

Setup¶

Wire PressurePlate → Targets → ProjectileTrap.

Inspector — ProjectileTrap¶

Field	Value
Projectile Prefab	arrow / bolt prefab
Fire Direction	perpendicular to the player's movement
Damage	20–30
Aim Target	Transform from `PartyVisuals`

Place multiple ProjectileTrap components on both sides of the corridor with opposing Fire Direction values — arrows fire from left and right simultaneously.

Type 9 — Pit + Crossbow Combo¶

What happens: The player steps onto a hatch cell. The hatch opens. At the same moment an arrow fires from the wall. Even if the player avoids the hatch, they still take the arrow.

Variant A — shared lever¶

One WallLever → Targets: both TrapDoorTrap and ProjectileTrap at the same time.

Variant B — arrow fires on fall¶

Use On Fall Triggered on TrapDoorTrap to call ProjectileTrap.Trigger() via UnityEvent. The arrow fires only after the hatch opens.

Inspector — TrapDoorTrap¶

Field	Value
Auto Trigger On Enter	✅
Trigger Delay	0.3 s
On Fall Triggered	→ `ProjectileTrap.Trigger()`

Inspector — ProjectileTrap¶

Field	Value
Fire Direction	from the side wall
Damage	25

Type 10 — Gauntlet¶

What happens: The player must cross a corridor packed with hatches and arrows. Hatches open in sequence (each with a different Trigger Delay), arrows fire from a pressure plate at the corridor entrance. A safe path exists — the player has to find it.

Combines Type 4 (cycling hatches), Type 7 (repeating), and Type 8 (crossbow corridor).

Setup¶

Lay out 4–6 TrapDoor cells along the corridor — each with a different Trigger Delay (0 s, 0.5 s, 1 s, 1.5 s…), Permanent = false, Trigger Once = false.
Connect one WallLever to all hatches — toggling it shifts which hatch is open at any given moment.
Place a PressurePlate at the corridor entrance wired to ProjectileTrap components on both sides.
The player reads the hatch rhythm first, then enters and sprints through the safety window.

Inspector — each hatch¶

Field	Value
Auto Trigger On Enter	✅
Permanent	❌
Trigger Once	❌
Close Delay	2–3 s
Trigger Delay	different per hatch: 0, 0.5, 1.0, 1.5…

Animator — each hatch¶

All four states + both triggers + all four transitions — identical to Type 2.

Tip

Add On Fall Triggered → TriggerPlaySound on each hatch — the sound of the party falling, heard from the far end of the corridor, builds tension for the next attempt.

Dungeon Crawler Framework — Mantis3de