Underhell is a Source Engine game developed by the Underhell Team in collaboration with We Create Stuff. Underhell Chapter 1 requires ONLY Source SDK Base 2007 installed. No Source game is required.

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3 years and counting

3 years and counting

News 63 comments

It's now been 3 years that Underhell Chapter 1 has been released. And it may be a few more before the next Chapter.

Underhell - 2 Years later

Underhell - 2 Years later

News 56 comments

Well, it's been 2 years already, and there's still a long road ahead.

Top Halloween Mods

Top Halloween Mods

Feature 8 comments

We dig up some good ole horror mods for you to try this halloween season.

Underhell Chapter One - Anniversary

Underhell Chapter One - Anniversary

News 35 comments

One year ago today Underhell Chapter one was released. A lot of things have happened throughout the year, let's see where we are and where we are headed.

Mod Of The Year 2013 Editor Choice

Mod Of The Year 2013 Editor Choice

Feature 39 comments

Welcome to the Editors Choice award for Mod of the Year 2013. Here the editors of ModDB have their say on the most prolific mods both released and unreleased...

How to play Underhell - Coop (Unofficial version)

How to play Underhell - Coop (Unofficial version)

Other Tutorial 25 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...

Quarter 01 Year in Review 2013

Quarter 01 Year in Review 2013

Feature 2 comments

ModDB's Year in Review Quarter 01 January through till March 2013.

Underhell has been Greenlit on Steam !

Underhell has been Greenlit on Steam !

News 25 comments

Underhell has recently been Greenlit on Steam, thanks to everyone who voted. Updates on the weapon modeling of the game + a new ModDB design, and a Fan-Made...

The 90 best horror games on PC

The 90 best horror games on PC

Feature 2 comments

You want to play new horror games? Put that cash-wad away. No, really, put it away it’s crawling with deadly spiders. I have some good news - there...

Underhell begins now

Underhell begins now

News 30 comments

In case you haven't looked at the calendar, today Underhell begins! Also, development news!

This Mod Is Basically A Great-Looking, Full-Blown Survival Horror Game

This Mod Is Basically A Great-Looking, Full-Blown Survival Horror Game

Feature 12 comments

It's called Underhell, and it's calling itself a mod—though it's closer to a full, stand-alone game. Specifically, an episodic survival horror-adventure...

PCGamer Mod of the Week

PCGamer Mod of the Week

Feature 7 comments

How best to describe Underhell, a mod (a game, really) for the Source Engine? Well, it’s a tactical squad-based hostage-rescue shooter, a supernatural...

Underhell Entity List

Underhell Entity List

Mapping/Technical Tutorial 26 comments

This is a list of the new entities we added in Underhell. This way you can add them into your custom maps, and enjoy the new features!

Underhell Chapter 1 Released

Underhell Chapter 1 Released

News 105 comments

Underhell Chapter 1 + Prologue remake has been released. After over 2 years of hard work, we hope you will enjoy the game.

Underhell Chapter One available for OST buyers!

Underhell Chapter One available for OST buyers!

News 14 comments

Underhell Chapter One is now available for everyone who purchased the OST! Check your email !!!

Underhell Chapter One OST AVAILABLE NOW!

Underhell Chapter One OST AVAILABLE NOW!

News 25 comments

The Underhell Chapter One Original Soundtrack is available now! Buy it before the game's official release, and you can get the game ONE DAY EARLY !

Underhell Chapter 1 Release Teaser

Underhell Chapter 1 Release Teaser

News 36 comments

It's been said before, but this time, I mean it. I'll see you inside.

Difficulty Scaling

Difficulty Scaling

Mapping/Technical Tutorial 24 comments

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

Underhell Chapter 1 : Features Showcase Video PART 2

Underhell Chapter 1 : Features Showcase Video PART 2

News 23 comments

Hello everyone, and welcome BACK to this second Features Showcase video! It has been a while since the first one, and there were still things that weren't...

Underhell Chapter 1 : Features Showcase Video

Underhell Chapter 1 : Features Showcase Video

News 30 comments

Hello everyone, and welcome to this Features Showcase video! I believe it is time we start to talk about some of the new features and content in Underhell...

Custom Titles System

Custom Titles System

Mapping/Technical Tutorial 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...

Underhell Chapter One Beta Public Livestream

Underhell Chapter One Beta Public Livestream

News 11 comments

Underhell Livestream, Beta - Saturday, October 27, 1600 hours (4 PM)

Item_Random for Random Loot !

Item_Random for Random Loot !

Mapping/Technical Tutorial 5 comments

This brief tutorial will explain how the random placement and selection of items/weapons works in Underhell, as well as a short tutorial on how to place...

Underhell Greenlight: Between righteousness and luck

Underhell Greenlight: Between righteousness and luck

News 17 comments

Underhell is now on Steam Greenlight! Vote for it if you want it to get on steam for free!

Underhell Chapter 1 : Not so Monthly Update - August

Underhell Chapter 1 : Not so Monthly Update - August

News 9 comments

Yeah! 3 Months! Finally another Monthly Update... Too many things to discuss in just one news, so I posted all the technical things in the Tutorials Section...

Enemy AI Improvements & Sneaky Gameplay

Enemy AI Improvements & Sneaky Gameplay

Mapping/Technical Tutorial 10 comments

This is a short explanation of how the "Sneaky Gameplay" works in Underhell, and how the enemy AI was improved and tailored to help it work correctly...

Player Model and Mirror Reflections

Player Model and Mirror Reflections

Mapping/Technical Tutorial 22 comments

A short explanation followed by a tutorial about the Player Model and the Mirror Reflections systems in Underhell.

Multiple Render Targets, Higher Resolution Monitors

Multiple Render Targets, Higher Resolution Monitors

Mapping/Technical Tutorial 16 comments

This tutorial will explain how we implemented a system to workaround the Source Engine's limitation of having only 1 Ingame Camera active at a time, and...

Bodygroups, Gibs, Ragdolls and Decals

Bodygroups, Gibs, Ragdolls and Decals

Mapping/Technical Tutorial 11 comments

This tutorial will explain how Bodygroups, Gibs, Ragdolls and decals work in Underhell, and which features has been added.

New Message Entities Inputs

New Message Entities Inputs

Mapping/Technical Tutorial 4 comments

This tutorial will explain the new "Env_Message", "Env_HudHint" and "Env_Global" inputs that we have incorporated into Underhell, to facilitate a lot...

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3 years and counting
3 years and counting
Top Halloween Mods
Top Halloween Mods
Multiple Render Targets, Higher Resolution Monitors
Multiple Render Targets, Higher Resolution Monitors Basic Mapping/Technical
Difficulty Scaling
Difficulty Scaling Basic Mapping/Technical
Underhell Entity List
Underhell Entity List Basic Mapping/Technical
Player Model and Mirror Reflections
Player Model and Mirror Reflections Basic Mapping/Technical
Enemy AI Improvements & Sneaky Gameplay
Enemy AI Improvements & Sneaky Gameplay Basic Mapping/Technical
New Message Entities Inputs
New Message Entities Inputs Basic Mapping/Technical