Lockpicking in D&D 5e is intentionally simple, but there’s some nuance depending on how your DM runs it.

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🔐 The Basics

Lockpicking uses a Dexterity check with proficiency in Thieves’ Tools.

Formula:

d20 + Dexterity modifier + proficiency bonus (if proficient with Thieves’ Tools)

So if your rogue has +3 Dex and +2 proficiency, they roll:

d20 + 5

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🧰 What You Need

• Thieves’ Tools (required unless your DM allows improvisation at disadvantage)
• Proficiency in Thieves’ Tools (not required, but very helpful being able to add your Proficiency bonus)

Classes that often get this:

• Rogues & Artificers
• Some backgrounds (Criminal, Urchin)
• Certain feats or subclasses

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🎯 Difficulty Class (DC)

The DM sets the DC based on the lock’s quality:

• DC 10 – Simple lock (cheap chest)
• DC 15 – Standard lock (most doors)
• DC 20 – Good lock (guarded or secure areas)
• DC 25+ – Masterwork or magical-quality lock

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⏱️ Time

Rules are flexible, but typical interpretations:

• One attempt = 1 action (in combat)
• Outside combat = a few seconds to a minute per attempt

Some DMs may:

• Limit retries
• Increase DC after failures
• Trigger consequences (noise, broken tools, traps)

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💥 Failure Consequences (DM-dependent)

Failing doesn’t always mean “nothing happens.” The DM might rule:

• You simply fail → try again
• You jam or break the lock → next attempt is harder (increase DC) or unable to pick without repairing the lock
• Lock shows signs of tampering / noise / suspicion
• You damage or break your tools → Disadvantage until tool repaired/replaced or needing new tools
• You trigger a trap → Trap or Alarm

👉 Important: Failure should change the situation, not just stop play.

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✨ Advantage / Disadvantage

You might get:

Advantage if:

• You have plenty of time
• Good lighting
• High-quality tools
• Assistance from another character
  • Help Action → Advantage
  • Holding light → remove disadvantage of poor visibility
  • Casting Guidance → bonus of 1d4 to check
  • Holding door steady → negate a trait (situational)

Disadvantage if:

• Rushing
• Poor visibility
• Improvised tools
• Under pressure (combat, danger)

🧠 Related Mechanics

Dexterity (Sleight of Hand) is not used for lockpicking (common mistake), it’s strictly Thieves’ Tools proficiency. However, Sleight of Hand might be used to hide the act of picking a lock

Intelligence (Investigation) could be used to analyze a lock mechanism, using the locks DC to make the check :

On success:

• Next roll gains advantage

On failure:

• Wastes time (counts as failure)

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🧙 Magical Alternatives

Sometimes it’s easier to skip the lock entirely:

• Knock spell → instantly opens locks (but makes loud noise)
• Mage Hand → manipulate tools at range (Arcane Trickster)
• Dispel Magic → remove magical locks

🔐 Custom Lock Tiers (5e-Compatible)

Alright—let’s turn lockpicking into something that actually feels different from door to door instead of just “roll vs DC.”

Below is a custom lock tier system you can drop straight into your campaign. It adds identity, progression, and a bit of tension without bogging things down.

Each tier defines:

• DC
• Time per attempt
• Failure consequences
• Unique traits (what makes it interesting)

⚡ Optional System: Lock “Progress”

Instead of pass/fail, give locks HP-like progress:

• Each successful check = 1 progress
• Harder locks require:
  • Tier 1–2 (DC 5-10): 1 success
  • Tier 3–4 (DC 10-20): 2–3 successes
  • Tier 5–6 (DC 20-30): 3–5 successes
• Progress Tracks
  • Each success = +1 progress
  • Exceed DC by 5+ = +2 progress
  • Fail by 5+ = +2 failures
  • Nat 20: Instant success OR +2 progress
  • Nat 1: Tool slips → consequence triggers immediately

Failures:

• Slow progress (Time Pressures?)
• Add complications
• Increase DC

👉 This makes lockpicking feel like disarming a bomb instead of flipping a switch

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🪵 Tier 0 — Crude Locks

“Keeps honest people honest.”

• DC: 8–10
• Time: 1 action
• Failure: No consequence
• Traits:
  • Can be opened without proficiency
  • Strength (Athletics) check can break it (DC 10)

👉 Use for: peasant chests, old sheds, starter dungeons. These are basically tutorial locks.

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🪛 Tier 1 — Common Locks

Standard adventuring fare

• DC: 12–14
• Time: 1 action (combat) / ~30 seconds (exploration)
• Failure: No progress
• Traits:
  • Retry freely
  • On a natural 1: disadvantage on next attempt

👉 Use for: inns, basic homes, merchant crates. Baseline locks [Masterlocks].

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🔒 Tier 2 — Quality Locks

“Someone cared about protecting this.”

• DC: 15–17
• Time: 1 minute per attempt
• Failure:
  • Fail by 5+: lock partially jams → +2 DC next attempt
• Traits:
  • Requires proficiency with Thieves’ Tools for normal attempts
  • Without proficiency: disadvantage

👉 Use for: guild storage, guarded rooms, minor vaults.

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🧠 Tier 3 — Advanced Mechanisms

Complex internal design

• DC: 18–20
• Time: 1–5 minutes per attempt
• Failure:
  • Fail by 5+: jammed (must spend 1 minute to reset before retry)
• Traits:
  • Requires proficiency in Thieves’ Tools
  • If proficient: may add Intelligence modifier instead of Dexterity (understanding mechanism)
  • Grants advantage if studied beforehand (1 minute inspection)

👉 Use for: noble estates, arcane labs, high-end safes.

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⚙️ Tier 4 — Masterwork Locks

Crafted by experts

• DC: 21–24
• Time: 5+ minutes per attempt
• Failure:
  • Fail by 5+: tools take damage (disadvantage until repaired)
• Traits:
  • Requires proficiency in Thieves’ Tools
  • Requires specialized tools (fine picks, tension calibrators, etc.)
  • Without proper tools: disadvantage + increased time

👉 Use for: royal vaults, elite guilds, legendary loot rooms. High tension, high risk.

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🧩 Tier 5 — Puzzle Locks

More than a lock—it’s a challenge

• DC: 20–25 (or multi-step)
• Time: Variable (minutes to hours)
• Failure:
  • May reset progress
  • May trigger traps or alarms
• Traits:
  • Requires solving a mechanical puzzle (patterns, sequences, symbols)
  • Successful check = progress, not instant success
  • Typically needs 3 successes before 2 failures

👉 Use for: ancient ruins, tombs, story-critical gates. Feels like solving a safe, not picking a lock.

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✨ Tier 6 — Arcane Locks

Magic-enhanced security

• DC: 20–30
• Time: 1–10 minutes
• Failure:
  • Magical backlash (damage, noise, alert). Symbol spell (7th level).
• Traits:
  • Requires Thieves’ Tools + Arcana proficiency OR magical assistance
  • May be affected by spells like Knock or Dispel Magic – but likely not, or only disables magical part, not the complicated lock (reduce DC).
  • Often layered with mundane locks

👉 Use for: wizard towers, enchanted vaults, relic chambers. This is where things get dangerous.

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Alternatives

‘Lockpickery’ by Bob the World Builder

5e rules supplement called ‘Lockpickery’ by Robert Mason (Bob the World Builder) offers an clever design that turns lockpicking into a timed action where success is expected, but complications scale with risk. Lockpickery allows for failing forward and changes the question of “Do I succeed?” to players asking “How messy is this going to be?”

🎭 What Makes It Different from 5e

Standard 5e:

• Roll d20
• Pass/fail
• Retry if needed

Lockpickery:

• Time is guaranteed
• Success is likely
• Risk = complications, not failure

⚖️ What It Emphasizes

• ⏱️ Time pressure (guards, danger, urgency)
• 🎲 Risk management (more dice = more chance of problems)
• 🎭 Narrative consequences instead of dead ends

🔐 Lockpickery — How It Works

Lockpickery replaces the normal single d20 lockpicking check with a system based on:

• Time (rounds) – which the PC’s must dedicate before any rolls are made, the results can then change the length of time needed.
• Dice pools (d6s)
• Complications instead of failure

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⚙️ Step 1: Set the Lock

Take a normal 5e lock and convert it:

• Round the DC to the nearest 5
  • DC 13 → 15
  • DC 18 → 20
• Determine Lock Complexity
  • Usually:
    Complexity = DC ÷ 5
  • So:
    • DC 15 → Complexity 3
    • DC 20 → Complexity 4

👉 Complexity represents both:

• How long it takes
• How many dice are rolled

⏱️ Step 2: Time to Pick the Lock

• Each point of Complexity = 1 round
• A round = ~6 seconds

So:

• Complexity 3 → 3 rounds (~18 seconds)
• Complexity 4 → 4 rounds (~24 seconds)

👉 Important:
You don’t roll immediately—you commit time first.

[Recommend reducing the the rounds by 1 so simple locks are still resolved within 1 round]

🎲 Step 3: Roll the Dice Pool

After the time passes, roll:

2d6 per point of Complexity

Examples:

• Complexity 3 → 6d6
• Complexity 4 → 8d6

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🎯 Step 4: Determine the Outcome

✔️ Success Condition

• If NO dice show a 1 → the lock opens cleanly

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⚠️ Complications (Fail Forward)

• Every die showing a 1 = a complication

You still make progress—but something goes wrong.

Typical interpretation:

• 1 one:
  • Takes longer (extra round)
• 2 ones:
  • Lock shows signs of tampering / noise / suspicion
• 3+ ones:
  • Serious issue:
    • Tool breaks
    • Lock jams
    • Trap triggers

👉 The exact outcome is up to the DM

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ChatGPT was used for formatting, spelling/grammar and simplifying ‘Lockpickery’.