---
title: "One-armed Robber: Complete Heist Guide"
game: "One-armed robber"
game_url: "https://qna.gg/games/one-armed-robber"
author: "Qloud"
author_url: "https://qna.gg/players/Qloud"
topics: ["Co-op", "Weapons"]
summary: "A practical guide to One-armed Robber, the free-to-play co-op heist game where every robber has exactly one arm: how heists work, stealth versus loud, the heist list, progression (levels, cash, skills, weapons), the…"
url: "https://qna.gg/g/one-armed-robber-complete-heist-guide-408b7af1"
published: "2026-09-27T17:20:55.079Z"
updated: "2026-09-27T17:20:55.079Z"
source: "QnA.GG"
---

# One-armed Robber: Complete Heist Guide

A practical guide to One-armed Robber, the free-to-play co-op heist game where every robber has exactly one arm: how heists work, stealth versus loud, the heist list, progression (levels, cash, skills, weapons), the new cosmetics system and team tactics.

*Researched September 2026 — current as of the "Skins update patch" (September 14, 2026), following the Weapon Skins and Postal Office update (August 21, 2026). Live games change; check the linked sources if something differs.*

## What Kind of Game It Is

One-armed Robber (developer and publisher Duhndal, released December 15, 2023) is a chaotic first-person heist game, free to play on Steam with single-player and online co-op. You drive up in a truck, get into the building, reach the vault or target, stuff your duffel bag with loot and get out. The joke is the premise: you only have one arm, so everything you do (carrying, shooting, opening things) is a one-handed juggle. Bring a friend and you have two arms between you.

## Quick Start

1. **You start with a suppressor and a lock pick.** That's everything you need for a quiet first heist. Don't feel you have to buy anything before your first run.
2. **Start with Liberty Hawk Bank.** It's the beginner heist: a small city bank without advanced security.
3. **Decide stealth or loud before you enter.** Each heist supports both, but your loadout should match. Suppressor for stealth; damage and extended magazines for loud.
4. **Tie up civilians instead of shooting them.** Killing civilians triggers a civilian casualty penalty that takes a cut of your total take at the end.
5. **Loot is the objective.** Once in the vault, the goal is the same regardless of approach: fill the duffel bag, get it out alive.
6. **Your duffel bag has limits.** If you can't fit all the vault loot, run back to the truck for a new bag or have teammates carry more.
7. **Levels unlock gear; cash buys it.** Weapons unlock at a player level and then cost in-game money.
8. **Research skills.** You pay cash to start a skill's research; it then progresses as you play. Each skill has three tiers.
9. **Use the server browser.** Since January 2026, "Find game" opens a traditional server browser so you pick the session you join.
10. **Launch daily for crates.** After 15 minutes of play, a cosmetic crate drops once per day when you complete a heist.

## Core Mechanics

### Stealth

- **Guards** patrol set routes. Watch a patrol before you move.
- **Cameras** can spot you. Destroying one is an option, but guards may come to check cameras that go dark (a January 2026 fix made guards reliably check destroyed cameras).
- **Line of sight** matters. The September 2026 patch tweaked some environment sightlines on the Postal Office specifically because guards could spot players unfairly.
- **Lock picks** open doors quietly; every new player starts with one.
- **Powerboxes** can be sabotaged; the **Saboteur** skill speeds this up.
- **Lasers and alarms:** Many vaults are protected by laser grids. Disabling them usually needs a password, a timer window or a panel (see each heist below).

### Going loud

- Once the alarm is up, police respond and the heist becomes a firefight.
- Loud builds want **damage and bullets**: extended magazines, higher-capacity weapons and shotguns for close quarters.
- The **Scavenger** skill increases ammo from police drops, which is essential for long loud runs.
- **C4** is an option for forcing entry, and the January 2025 update made C4 blasts physically throw NPCs.

### Civilians

- Civilians can raise the alarm. **Tie them up** to neutralize them without penalty.
- Shooting them costs you money at the end through the civilian casualty penalty.

### Loot and the truck

- Your duffel bag holds a limited amount. When it's full, carry it to the truck and grab a new one, or split the load across teammates.
- Plan the route from vault to truck before you start filling bags. The run back is where most loud heists go wrong.

## The Heists

| Heist | Complexity (our rating; only Liberty Hawk is officially called beginner) | Target and key mechanics |
|---|---|---|
| Liberty Hawk Bank | Beginner | Small city bank with no advanced security. Learn the basics here |
| Rodman Research Facility | Intermediate | Steal chemical beakers and process them in the lab centrifuge into a high-value chemical weapon |
| Lundenburg Liquors | Intermediate | Rare wine in the cellar, behind barred cells with a laser array; a security tag detector sets off the alarm if bottles leave the room |
| Black Diamond Casino | Advanced | Vault protected by two laser arrays that can only be switched off for 30 seconds at a time; a mobster basement guarded by a biometric hand scanner |
| Mansion Heist | Advanced | Steal a supercar from the basement garage during the owner's birthday party; laser grids, high-tech cameras, patrolling guards, guests, hackable security and multiple entry points |
| Harbour Heist | Advanced | Night-time thunderstorm at a shipping yard. Break into containers holding missile guidance chips; each has a laser grid you disable with a password, and opening one before disabling the alarm is punished |
| Postal Office | Intermediate | Sneak into a postal depot and break into delivery trucks full of jewellery using a password before they leave. Released as a free map in August 2026 |

Some maps are sold separately as in-game purchases (there is no Steam DLC page; the developer regularly runs "all maps 25% off" during Steam seasonal sales), while others have been released free; check the map select screen for what you own.

### Heist-specific tips

- **Lundenburg Liquors:** Don't carry bottles out of the tagged room until the security tag detector is dealt with, or you'll trigger the alarm yourself.
- **Black Diamond Casino:** The 30-second laser window is the whole puzzle. Have everyone in position before someone flips the switch.
- **Harbour Heist:** Find the password first, disable the laser grid, and only then open the container.
- **Postal Office:** The September 2026 patch locked the shop doors (it's nighttime) and made important rooms more readable. Look for the truck password before breaking in.
- **Mansion:** Use the multiple entry points; the party guests are extra witnesses, so stealth here is about timing.

## Progression

### Levels, cash and weapons

Weapons unlock at a player level and are then bought with in-game money. From the January 2025 Weapons Update:

| Weapon | Type | Unlock level | Price |
|---|---|---|---|
| MS950 | Shotgun (primary) | 12 | $475,000 |
| SP5 | SMG (primary) | 15 | $525,000 |
| UP99 | Fully automatic pistol (secondary) | 19 | $425,000 |
| Sawed off | Shotgun (secondary) | 24 | $500,000 |
| XN 1070 | Shotgun (primary) | 25 | $700,000 |
| N1A | Semi-automatic rifle (primary) | 28 | $850,000 |
| IM1-G | Assault rifle (primary) | 32 | $900,000 |

Other weapons exist (for example the SPR-12, which got a skins fix in September 2026), and attachments like suppressors, extended mags and red dot scopes customize each gun.

### Skills

- Skills have their own tab in the main menu (its position has moved in recent updates).
- **Research:** Pay cash to start researching a skill. Research progresses as you play; when it completes, the skill unlocks and is equipped automatically.
- **Tiers:** Each skill has three tiers, each better than the last; finish one tier to research the next.
- You can research several at once, but your progress is split between them.
- Examples: **Scavenger** (more ammo from police drops) and **Saboteur** (faster powerbox sabotage).

### Grenades (Harbour Heist update)

| Grenade | Effect | Best for |
|---|---|---|
| Fragmentation | Explodes 3 seconds after the pin is pulled; don't try to pick it back up | Loud heists, clearing groups |
| Distraction | Lures a nearby guard to check it out for about 30 seconds | Stealth, moving a guard off a doorway |
| EMP | Disrupts nearby electronics for 30 seconds | Stealth, getting past electronic security |

### Cosmetics and crates (August 2026)

- Skins and charms can be applied to any weapon, and to several weapons at once.
- **Crates** drop once per day after 15 minutes of play when you finish a heist. They can also be bought and sold on the Steam Community Market.
- Opening a crate lets you pick a skin or charm and buy it with **heist coins**. Those skins/charms can't be traded or sold.
- A handful of skins are also buyable directly without a crate. Find them under Loadout, then Cosmetics under each weapon.

## Team Tactics

- **Assign roles:** one lock pick/sabotage player, one lookout on guards and cameras, one or two on loot and bag carrying.
- **Call patrols:** In stealth, a single spotter watching a guard route saves the whole team.
- **Chain bag runs:** One player shuttles bags to the truck while others keep filling at the vault.
- **Go loud together:** If the alarm triggers, regroup rather than scattering. Police drops feed ammo to whoever has Scavenger.
- **Share the grenades:** Distraction and EMP are team tools; coordinate who throws them and when.

## Common Mistakes to Avoid

- **Shooting civilians** and losing a chunk of your take.
- **Opening Harbour containers before the alarm is disabled.**
- **Carrying tagged bottles out of the Lundenburg cellar** too early.
- **Buying a loud loadout and trying to stealth**, or the reverse.
- **Researching too many skills at once**; progress is split.
- **Overfilling the bag and not planning the truck route.**
- **Throwing a frag and trying to grab it back.** Once the handle is off, it's going to explode.

## Advanced Tips

- **Stealth first, loud as a fallback.** Most heists allow a switch to loud if stealth fails, so start quiet and keep a loud-capable secondary.
- **Use EMP for timing puzzles** like the Casino's lasers: it buys you extra seconds around electronics.
- **Distract, then sneak.** A distraction grenade moves a guard for about 30 seconds, long enough to cross a room.
- **Farm cash on maps you know.** A clean run on a heist you've learned beats a messy run on a new one when you need money for weapons.
- **Check patch notes when a map changes.** Recent patches changed sightlines and door states on the Postal Office.

## FAQ

**Is One-armed Robber free?**
Yes, it's free to play. Some maps are sold separately and are often discounted in Steam sales; cosmetics use heist coins.

**Can I play solo?**
Yes. Single-player is supported, as is online co-op.

**How do I find public games?**
Press "Find game" to open the server browser (added January 2026).

**How do I get weapon skins?**
Launch daily and finish a heist after 15 minutes of play for a crate, then pick a skin or charm and buy it with heist coins. Some skins are purchasable directly.

**What's the newest heist?**
The Postal Office (August 2026), followed by tweaks in the September 14, 2026 patch.

**Why am I losing money at the end of a heist?**
Probably the civilian casualty penalty. Tie civilians up instead.

## Sources

- [One-armed Robber on Steam](https://store.steampowered.com/app/2551020/Onearmed_robber/)
- [Steam news: Skins update patch (Sep 14, 2026), Weapon skins and free map (Aug 21, 2026), Server Browser (Jan 8, 2026), Harbour Heist (Dec 18, 2025), Weapons Update (Jan 3, 2025)](https://store.steampowered.com/news/app/2551020)
- [Steam news API feed for One-armed Robber (heist, skills and penalty posts)](https://api.steampowered.com/ISteamNews/GetNewsForApp/v2/?appid=2551020)