Pick up the crowbar of research scientist Gordon Freeman, who finds himself on an alien-infested Earth being picked to the bone, its resources depleted, its populace dwindling. Freeman is thrust into the unenviable role of rescuing the world from the wrong he unleashed back at Black Mesa. And a lot of people, people he cares about, are counting on him.

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How to make maps and levels for the Source Engine BASICS!
Half-Life 2

How to make maps and levels for the Source Engine BASICS!

Joompy: A Half Life 2 Beta Engine Platformer Level Design/Theory

This tutorial will give you basic information on making maps and placing down entities, from here you can experiment.

Willgames' NPC Level Based Paths

Willgames' NPC Level Based Paths

Level Design/Theory Tutorial

How do you make paths for NPCs to walk in, in the Hammer editor? This article answers that question!

Willgames' Basic 2D Skybox tutorial

Willgames' Basic 2D Skybox tutorial

Mapping/Technical Tutorial

Skyboxes are easy, so if youre interested in making games for source its inevitable that in outside environments youll start to be in need of them.

Willgames' Choreography Source Engine Tutorial

Willgames' Choreography Source Engine Tutorial

Voice Acting Tutorial 1 comment

This tutorial covers the use of this tool and will help you get your foot up in creating in game dialogue, real time cut scenes, and awesome set pieces...

Play Half-Life: Alyx non-vr using a few commands!

Play Half-Life: Alyx non-vr using a few commands!

Half-Life: Alyx MK Edition (Mouse + Keyboard Remake) Installers 9 comments

Since a lot of you didn't like my mod being posted here, I made this post in which I tell you how to play HL:A with Mouse + Keyboard using a few consoles...

How to Create and Compile models from XSI Softimage to Source

How to Create and Compile models from XSI Softimage to Source

Props Modelling Tutorial

Basic and Detailed tutorial that explains and shows how to create your costum model From XSI > Texture > SMD > VTF Edit > CQ > Compiling > Source ENJOY!

How to install Source Mods!

How to install Source Mods!

Installers Tutorial 1 comment

A tutorial on how to install Source SDK Base Mods on Steam.

Half-life 2 Natural Movement Speed

Half-life 2 Natural Movement Speed

Starting a mod Tutorial

For those using the Occulus Rift, you may get a bit motion sick moving as fast as you do in game, so here is a way to do it without any need for input...

Half-Life 2: How To Install Skins Easily

Half-Life 2: How To Install Skins Easily

Textures Tutorial 9 comments

This tutorial will show you how to install skins for Half Life 2 in the easiest way. :D

Fixing CS:S Worldmodel for HL2 NPCs/HL2MP Players

Fixing CS:S Worldmodel for HL2 NPCs/HL2MP Players

Weapons Modelling Tutorial 4 comments

Fixing Counter-Strike: Source's weapon worldmodels for use with HL2 NPCs/HL2MP Players.

Swinging Doors Tutorial (HL2:ZPS Config)

Swinging Doors Tutorial (HL2:ZPS Config)

Mapping/Technical Tutorial 2 comments

Alright, I said I'd start making some Tutorials so why not start here. The game used is Hl2, the mod used is Zombie Panic Source!.

How to play Underhell - Coop (Unofficial version)
Half-Life 2

How to play Underhell - Coop (Unofficial version)

Underhell Other 26 comments

This small tutorial will explain how to play the unofficial Underhell Coop mode built into the engine. It is unstable, buggy, it will crash and lag, but...

Template multiplayer for Source SDK 2013

Template multiplayer for Source SDK 2013

Starting a mod Tutorial 4 comments

This code is mainly a port from the 2007 template SDK originally written by Valve and Tony Sergi to the 2013 recently relased Source engine.

Difficulty Scaling
Half-Life 2

Difficulty Scaling

Underhell Mapping/Technical 22 comments

Half Life 2 made you weaker, enemies tougher, and gave you less ammo. We intend to push things a little more.

Setting up a mod with the Source SDK 2013

Setting up a mod with the Source SDK 2013

Starting a mod Tutorial 15 comments

Just follow through these two videos, and you will have a mod that you are able to add custom code into. Since The new 2013 version of the SDK just recently...

How to make a prop in XSI for HL2

How to make a prop in XSI for HL2

Props Modelling Tutorial 2 comments

How to construct a prop in XSI, texture it, export it & compile to .mdl format and put in-game!

Creating a custom env_screenoverlay

Creating a custom env_screenoverlay

Textures Tutorial 5 comments

This tutorial will show you how to create a image in Photoshop that can be overlaid onto the player's vision in Half-Life 2 + Episodes

How to modify weapon models

How to modify weapon models

Skinning Tutorial 1 comment

How to decompile a model, edit a QC file, instal xsi addon, use XSI Mod tool 7.5

Triggering events in other levels
Black Mesa

Triggering events in other levels

Black Mesa: Uplink Mapping/Technical 4 comments

How do you trigger something beyond a trigger_changelevel, an entity that's in another BSP? Here is how it's done.

Custom Titles System
Half-Life 2

Custom Titles System

Underhell Mapping/Technical 6 comments

After hitting a hard limitation on the TITLES.TXT file, we have created our own system that allows us to not only create as many TITLES as we want, but...

[Black Mesa] Osprey and rapelling grunts
Black Mesa

[Black Mesa] Osprey and rapelling grunts

Black Mesa: Uplink Mapping/Technical 2 comments

How to set up the Osprey to drop a squad of grunts in Black Mesa (Source).

[Black Mesa] 50. cal machinegun (Player and NPC controlled)
Black Mesa

[Black Mesa] 50. cal machinegun (Player and NPC controlled)

Black Mesa: Uplink Mapping/Technical 6 comments

How to set up a 50 cal. machinegun in Black Mesa (Source).

[Black Mesa] TOW Missile System
Black Mesa

[Black Mesa] TOW Missile System

Black Mesa: Uplink Mapping/Technical

How to set up the TOW Missile system for Black Mesa (Source).

Killable Citizens in Source using the ai_relationship entity - Video

Killable Citizens in Source using the ai_relationship entity - Video

Mapping/Technical Tutorial 4 comments

Welcome to my second video tutorial in the Source Engine. Today you will learn how to make HL2 citizens killable.

Tutorial - Blender 2.6x and Source-Engine

Tutorial - Blender 2.6x and Source-Engine

Props Modelling Tutorial 1 comment

This is simple tutorial for Source-Engine's Modelling

Advanced Displacements in Source - Video

Advanced Displacements in Source - Video

Mapping/Technical Tutorial 1 comment

I had a look at Silverfisk's tutorial on displacements and thought it wasn't enough. Oh, be warned, when I'm recorded I sound like an 8-year old :D

How to create a Source Engine mod. Properly.

How to create a Source Engine mod. Properly.

Starting a mod Tutorial 22 comments

Hello people! Welcome to my first tutorial! I am going to tell you how to start creating a Source Engine mod. Properly. Make sure you have a Source game...

Anti Setup (NMRiH)

Anti Setup (NMRiH)

Mapping/Technical Tutorial

An "Anti" is a visgroup that is used to spawn entities to show that the objective string associated with it was not selected by the game that round. An...

Introduction to the Half-Life Model Viewer

Introduction to the Half-Life Model Viewer

Starting a mod Tutorial 1 comment

In this Tutorial I will explain to the best of my knowledge how the Half-Life Model Viewer can be used to view and inspect Models, I take an indepth look...

How to Get 3D Models to Glow in the Correct Way

How to Get 3D Models to Glow in the Correct Way

Textures Tutorial 5 comments

A tutorial on how to make your 3D model reskins in the source engine models to glow in the area you want them to. This tutorial requires knowledge of...