Garry's Mod Wiki - Complete Guide
Quick Facts
Developer: Facepunch Studios
Creator: Garry Newman
Initial Release: December 24, 2004 (Original Mod) / November 29, 2006 (Standalone Retail)
Engine: Source Engine (originally modified from Half-Life 2)
Platforms: Windows, macOS, Linux
Genre: Sandbox, Physics Simulation, Creation
Price: $9.99 USD on Steam
Requirement: Requires at least one Source Engine game (such as Half-Life 2 or Counter-Strike: Source) to access all assets, though it can run with the free base assets.
What Makes It Special
Garry's Mod—affectionately known as GMod—is not a game in the traditional sense. There are no objectives, no linear storylines, no scores, and no fail states. Instead, it is a physics sandbox that hands the player a sprawling toolbox and asks a single, open-ended question: "What do you want to do?"
What makes Garry's Mod truly special is its position as the grandfather of modern sandbox gaming and user-generated content platforms like Roblox and Dreams. Long before the advent of dedicated creative platforms, GMod was teaching players how to code, model, animate, and design game modes using Lua scripting. The game seamlessly bridges the gap between playing and developing. You can spawn a ragdoll and attach balloons to it just to laugh at the physics, or you can spend months developing a complex, multiplayer roleplaying server with custom economies, jobs, and animations.
The barrier to entry is famously low, but the ceiling is virtually infinite. The game's longevity is heavily tied to the Steam Workshop, which currently hosts over a million pieces of user-created content. This includes everything from high-definition weapon skins to entirely new game modes that operate almost as standalone experiences. The community has kept the game alive and relevant for nearly two decades, ensuring that no two downloads of Garry's Mod will ever yield the exact same experience.
How to Play
Because Garry's Mod lacks a structured goal, "how to play" is entirely dictated by the tools you choose to use and the servers you decide to join. However, understanding the foundational mechanics is essential before diving into the chaos.
The Core Tools
Garry's Mod operates primarily through a contextual tool gun and a physics gun, both mapped to the player's number keys. The tool gun is your primary means of interaction with the world, while the physics gun allows you to manipulate objects in the environment.
- Physics Gun: This glowing blue beam allows you to pick up, move, rotate, and freeze almost any prop or ragdoll in the game world. It is the foundational tool of the sandbox, allowing you to pose characters, build structures, and arrange scenes.
- Tool Gun: The bright red tool gun is how you build. By scrolling your mouse wheel, you can cycle through dozens of different tools. Each tool alters how the gun interacts with props. For example, the "Weld" tool permanently fuses two objects together, while the "Thruster" tool attaches a controllable rocket to a prop, allowing for rudimentary flight.
- Spawn Menu: Accessed by pressing 'Q', this massive radial menu is your inventory. It is divided into categories like Props, Weapons, Vehicles, NPCs (Non-Player Characters), and Entities. You can spawn everything from a simple wooden crate to fully functional AI-controlled Combine soldiers.
Construction and Contraption Building
The act of building in Garry's Mod is affectionately referred to as "contraption building." Players use the spawn menu to bring props into the world, the physics gun to position them, and the tool gun to connect them. Advanced builders use a hierarchy of tools—such as Easy Weld, Axis, Ballsocket, and Adv Dupe (Advanced Duplicator)—to create incredibly complex machines. These can range from working cars with suspension and steering, to fully automated turrets, to massive, flying airships that defy the limitations of the Source Engine.
Multiplayer Game Modes
While single-player offers a quiet space to build, the vast majority of players experience Garry's Mod through its multiplayer servers. The base game is simply a canvas, but the community has created distinct, highly popular game modes that function almost like separate games:
- Sandbox: The default mode. Players share a map and build together, often collaborating on massive projects or engaging in spontaneous prop fights.
- DarkRP: A deeply complex roleplaying mode. Players assume roles like Citizen, Police Officer, Medic, or Gangster. They earn money by holding jobs, buying properties, and interacting with other players within a strict set of server rules.
- Trouble in Terrorist Town (TTT):strong> A social deduction game heavily inspired by the classic "Mafia" or "Werewolf" party games. A group of players are placed on a map as "Innocents," but a small percentage are secretly designated as "Traitors." The Traitors must kill the Innocents without getting caught, while the Innocents must figure out who the Traitors are and eliminate them.
- Prop Hunt: A hide-and-seek mode where one team plays as Hunters and the other team plays as Props. The prop team can select any object in the map—like a chair, a plant, or a barrel—and attempt to blend in with the environment to survive until the time runs out.
- Murder: A minimalist mode where one player is given a knife and must secretly murder everyone else on the map, who are armed only with a single bullet to shoot the murderer if they figure out who it is.
World & Lore
Strictly speaking, Garry's Mod has no lore, no narrative, and no world of its own. It is an empty vessel. However, because it is built on the Source Engine and requires the ownership of other Valve games to function properly, Garry's Mod effectively inherits the lore, settings, and characters of the entire Half-Life and Counter-Strike universes.
When you load into a map, you are stepping into the remnants of Valve's worlds. The most iconic maps in Garry's Mod are directly lifted from Half-Life 2. You will frequently find yourself building spaceships in the dystopian, Eastern European-inspired City 17, or constructing forts in the coastal, zombie-infested town of Ravenholm. The Combine Overlord, the mysterious G-Man, and the alien Headcrabs are all native entities to GMod, treated not as narrative drivers, but as toys for the player's amusement.
Furthermore, the game's expansive NPC system allows players to spawn characters from Team Fortress 2, Portal, and Counter-Strike. It is entirely common to see a scene where Gordon Freeman is fighting alongside Heavy from Team Fortress 2 against a horde of Counter-Strike terrorists. Garry's Mod's "lore" is entirely emergent, created in the moment by the player's imagination. The juxtaposition of these distinct, serious, and comedic universes in a single sandbox has birthed thousands of iconic internet videos, most notably the "YouTube Poop" and surreal machinima era of the late 2000s and early 2010s.
Getting Started Guide
Launching Garry's Mod for the first time can be incredibly overwhelming. The main menu is sparse, and clicking "Start New Game" drops you into an empty map with no instructions. To help you transition from a confused newcomer to a seasoned builder, follow these essential first steps.
Step 1: Prepare Your Source Games
Before you do anything else, ensure you have Counter-Strike: Source and Half-Life 2: Episode 2 installed on your computer. You do not need to play them, but GMod relies on their asset files. CS:S provides the most widely used props, weapons, and player models in the community. Without it, you will see massive red "ERROR" signs everywhere you go, because your game lacks the 3D models required to display what other players have spawned. Half-Life 2: Episode 2 provides essential textures and maps. To mount these games, open GMod, go to the main menu icon in the bottom right corner, select "Controls" and then "Options," and ensure the games are checked under the "Mount" tab.
Step 2: Learn the Holy Trinity of Controls
Spend your first thirty minutes in a private, single-player Sandbox map. Do not join a server yet. Memorize these controls until they are muscle memory:
- Q: Opens the Spawn Menu. This is your lifeline. Close it by pressing Q again.
- Mouse Wheel (Scroll): Changes the active tool on your Tool Gun. You will use this constantly.
- Left Mouse Button (LMB): Primary action (Shoot, apply tool effect, select menu item).
- Right Mouse Button (RMB): Secondary action (Undo a selection, apply secondary tool effect).
- E: Use/Interact. This opens doors, picks up weapons, and interacts with custom entities on RP servers.
- Ctrl: Crouch. Essential for fitting into tight spaces or navigating complex builds.
- Z, X, C: Undo, Redo, and Context Menu respectively. 'Z' is your best friend when you make a mistake while building.
Step 3: Master Basic Welding
Try building a simple car. Spawn a seat from the "Vehicles" tab. Spawn a few rectangular props from the "Props" tab. Select the "Weld" tool from your tool gun. Left-click on the seat, then left-click on a prop. They are now permanently connected. Use the Physics Gun to move the prop, and attach wheels from the "Vehicles" tab using the Weld tool. Once you have wheels, use the "Thruster" tool to attach engines to the back of the car. Press 'E' to sit in the seat, and press your number pad keys to fire the thrusters. Congratulations, you have built your first contraption.
Step 4: Curate Your Addons
Do not go to the Steam Workshop and subscribe to everything at once. Too many addons will drastically increase your loading times and cause severe game instability, leading to crashing. Start by subscribing to one essential pack: "CS:S Realistic Weapons" or similar high-quality weapon packs, as vanilla GMod weapons are notoriously clunky. Next, find a "Props Pack" that appeals to you. Once you have a few dozen addons that you genuinely need, stop. If a server requires a specific map or addon, it will usually prompt you to download it automatically when you join.
Step 5: Finding the Right Server
When you are ready for multiplayer, open the server browser, select "Internet," and filter by players. Look for servers running modes like "Trouble in Terrorist Town" or "DarkRP." Pay attention to the server's ping (the number in milliseconds next to the server name). Anything under 100ms is playable; anything over 150ms will result in severe lag where your shots don't register and physics behave erratically. Furthermore, read the server name carefully. Servers that say "FastDL" have fast downloads, meaning you won't wait an hour to download their custom content. Finally, always read the rules when you join an RP server, as admins on these servers are notoriously strict.
Common Questions
Is Garry's Mod a dead game?
Absolutely not. While its peak player count from the late 2000s and early 2010s has naturally tapered off, Garry's Mod consistently maintains tens of thousands of concurrent players on Steam. It frequently ranks in the top 50 most played games on the platform, a staggering achievement for a title nearly two decades old. The community turnover is high, but new players are constantly discovering it through content creators and word of mouth.
Do I have to buy other games to play it?
Technically, no. You can launch Garry's Mod completely standalone. However, the experience will be heavily degraded. You will be limited to the basic Half-Life 2 assets, and many community maps and servers will be unplayable due to missing textures and models, resulting in the infamous "ERROR" signs and purple-and-black checkerboard textures. Buying Counter-Strike: Source on sale is highly, highly recommended.
Why does my game take so long to load?
Garry's Mod is notoriously slow to load because of how it handles custom content. When you subscribe to an addon on the Steam Workshop, the game has to process, decompress, and mount those files every single time you launch the game. If you have subscribed to hundreds of props, maps, and weapons, your load times can stretch into ten or fifteen minutes. The fix is simple: go to your Steam Workshop subscriptions for GMod and unsubscribe from anything you don't actively use.
Can I play Garry's Mod on a Mac or Linux?
Yes. Facepunch Studios officially ported Garry's Mod to macOS and Linux in 2013. However, because the game relies on the Source Engine—an engine that Valve has largely abandoned on non-Windows platforms—Linux and Mac users often experience more bugs, lower frame rates, and compatibility issues with certain community addons that were built exclusively with Windows in mind.
Is Garry's Mod safe for kids?
The game itself carries no official age rating for its sandbox elements, but extreme caution is advised for younger players. The multiplayer environment is entirely unmoderated by the developers. Voice chat is ubiquitous and frequently contains profanity, slurs, and toxicity. Furthermore, the Steam Workshop contains user-created content ranging from highly violent to explicitly adult in nature. While the tools can be used for incredible creativity, the social ecosystem of public servers is generally geared toward older teens and adults.
What is the difference between Garry's Mod and games like Rust or S&box?
Garry's Mod is a purely creative, modding-focused sandbox built on an older engine. Rust, also by Facepunch Studios, is a survival game with PvP elements; while you can build in Rust, the goal is survival, not unrestricted creation. S&box is Garry Newman's current, in-development successor to Garry's Mod. It is built on a brand-new, custom engine and aims to modernize the sandbox experience with better physics, easier coding, and native VR support, though it is still in early access and lacks the massive addon library of GMod.
