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237 ratings
Game engine Source.

Write in comments about the games on the engine Source and I will add them to the collection.
Items (32)
Black Mesa
Created by cman2k
Prepare for an experience that you will find Nostalgic, exciting and fresh. Black Mesa is a re-envisioning of Valve Software's seminal game Half-Life. You will re-visit the inaugural role of Gordon Freeman and his memorable journey through the Black Mesa...
Lambda Wars
Created by Vortal Storm
Lambda Wars is a free multiplayer Source Engine modification for Alien Swarm set in the Half-Life 2 universe that brings the war between mankind and their brutal Combine overlords to a traditional real-time strategy (RTS) setting. Lead the uprising...
No More Room in Hell
Created by XƎNDRID
"When there is no more room in hell, the dead will walk the earth."

We have been Greenlit by the community! Your support has given our mod a much brighter future! Thank you! No More Room in Hell will always be 100% free. Once officially on Ste...
Operation Black Mesa
Created by Mc.Sug4r
Operation Black Mesa (Opposing force: Source)

Operation Black Mesa is a total remake of Half-Life: Opposing Force. Utilizing the Source engine, Tripmine Studios plans to recreate the Black Mesa Research Facility from the grou...
The Revenge
Created by levan
The Revenge is a first person game based on Half-Life universe. The main character is Anton Logov.
He has to get out of the city in order to deliver something important for the Resistance Forces.
It would seem like easy task - to come round Alliance road...
Portal: Alive & Kicking
Created by Rhetorical Games
"I'm often nit-picky, but even with my intimate familiarity of Portal I can see that nothing has been overlooked. Every tile on every panel has been revisited with loving detail. Not only have the visuals been updated to match Portal 2, but the weake...
Aperture Tag: The Paint Gun Testing Initiative
Created by Motanum
Aperture Tag: The Paint Gun Initiative is a mod for Portal 2. Inspired by Tag: The Power of Paint, Aperture Tag is just what it sounds like. A Paint Gun in Aperture Science. Featuring a new personality core, in a new story, covering many areas of Ap...
Crossroads Episode I
Created by levan
Results of the first experiment. The short story of the first accident.

There are many parallels between the real World and the Crossroad`s Universe. The only difference is that science in Crossroads makes big steps in its development and discovers more...
Lost Squad
Created by DmitRex
EN - Lost Squad - is Source Engine based game about what happened to Barney Calhoun after Half-Life 2: Episode One events and why he was not in Half-Life 2: Episode Two. Cause it is an unofficial mod and we have our own plot it is not called Blue Shift 2....
Portal 2: Abyss
What is Abyss?
Abyss is a free Custom modification for the multiple Award winning game: Portal 2 created by Team Abyss. Abyss aims to give a new game experience to the players by introducing a custom story based on multiple choices with a ...
Divinia Chronicles: Relics of Gan-Ti
Created by Dieblein
Divinia Chronicles: Relics of Gan-Ti is a single-player, classic-style Action-RPG. With influences ranging from Ocarina of Time to Final Fantasy, this action-oriented title seeks to revive the vintage flavor and vibe of the classics in an original world wi...
Wilson Chronicles
Created by Frere D'λrme
English :

Wilson Chronicles is a total Source conversion of Half-Life : Wilson Chronicles using the Source Engine by Valve.

Once you have voted, visit to download and play our latest Demo ! On
Half-Life 2: Capture the Flag
Created by MENthish
Half-Life 2 Capture the Flag brings the fast-paced, run and gun style of classic CTF to the graphics rich environment of the Source Engine like never before. The game mod is set in the post apocalyptic world of Half-Life 2™ where the Combine face the HEV s...
Created by Glasseater
NEOTOKYO° is out for Download now! Check out the Links at the end of the discription!

NEOTOKYO is a first person shooter that provides a visceral & realistic combat experience in a rich futuristic setting. It is greatly influenced by our admiration f...
Alien Swarm FP
Created by bunny
This is a first person view modification of Valve’s Alien Swarm:

Originally posted by valve:
The game thrusts players into an epic bug hunt featuring a unique blend of co-op play and squad-level tactics. With your friends, form a squad of four distinct IAF Marine cla
Created by Mxthe
Underhell is a Source Engine Game that will be distributed in Episodic releases.
Prologue has been released on March 3rd, 2011.
Chapter 1 has been released on September 1st, 2013.

Fortress Forever
Created by squeek.
Requires only a FREE installation of the Source SDK Base 2006, download and play today at

Fortress Forever is a Source mod inspired by the earlier versions of the Team Fortress series (Team Fortress Classic ...
Created by Bluestrike
Spheritis is an 3D puzzle/race game where you control a ball and have to reach the exit portal before a timer expires.
Sound simple yes? But you must also activate a number of buttons first to activate the exit portal.
And to make matters worse, there ar...
Portal Remake Mod
Created by CLagaris
Portal Remake Mod is a revamped version of Portal. Portal Remake is a mod for Portal 2, that includes many new innovative features!

Portal Remake also has brand new models, such as the improved GLaDOS and four different cores - all of whic...
Reduction: The Alien Swarm Campaign
Created by XFunc_CaRteR
You are a squad of "Offworld Drop Marines".

You are engaged in a war with hostile creatures in the Outer Systems.

Your tour ending, you have returned to Earth.

And now you learn the war has reached your home planet...

What will you do?

Will ...
Created by defragen1
100% free and requires only a FREE installation of Alien Swarm!

Hypovolemia is a new 3rd person shooter with an emphasis on aggressive, thought provoking gameplay that rewards critical thinking and intelligent positioning for both the individual ...
Mutant Factions
Created by bencelot
Mutant Factions is an online shooter that combines fast-paced action with strategic RPG and RTS gameplay. Create the perfect build from over 30 uniquely balanced skills - you can poison your enemies then escape with invisibility; or bounce sniper bullets o...
The Gallery - Episode 1: Call of the Starseed
Created by Cloudheadgames
The Gallery is an episodic, fantasy exploration game built for virtual reality, inspired by the mystery of dark 80’s fantasy adventure films.

[h2]The Gallery - EP1: Call of the Starseed ™[/h2]

A strange message left by your mis...
Created by meteoric games
It is 2563, the human colonies are divided, caught in the grip of an interstellar cold war.

As an independent ship captain, you are hurled headlong into a hostile and dangerous universe. Make your way by whatever means you can, defend order or sow chaos...
Silent Escape
Created by Pro-Bones

Silent Escape is a first person shooter game, which events are unfolding parallel to the Half-Life 2 story. When situation in Сity-17 started to get out of control, the scientists had organized the plan of "Silent Escape". It was designed...
Half-Life 2 : Awakening
Created by Bluestrike
In this Free mod, released in 2007, you play as Adrian Shepard right before Gordon Freeman arrives in City 17.
Its also a bit of an Antlion origin story.
Note that future official releases in the Half-Life saga might contradict with this mod.

The mod ...
Portal Stories: Mel
Created by Anna
Portal Stories: Mel is an upcoming free to play mod based in the Portal universe.
It tells an entirely new story about a new protagonist called Mel who travels with a new personality core and faces a new, still unknown threat.

In the early years of Ap...
Hollow's Land
Created by CrazyRabit

It was the night of my sister's wedding the whole village showed up. The night was going as planned until the village got surrounded by guards from the kingdom. Glass got smashed, blood was spilled, tears was shed. As I look across th...
Half-Life 2: DownFall
Created by marnamai

DownFall is a free Half-Life 2 single-player mod taking place in the White Forest surroundings.
You're once more putting on the HEV suit as Gordon Freeman. Your mission is to recover a newly developed technology by t...
Portal 2: Timex
Created by RedSkittleFoxy :3
“Time is just another obstacle in the way of science.
Some people might try to get rid of that obstacle.
We decided to use it instead.”

In Aperture, a core named Alex wakes you up for testing a new device. This device is called the ASTEQTP,
Spherical Nightmares
Created by WizardExt
About the mod
Spherical Nightmares is a free Half-Life 2: Episode Two single-player modification.

The story takes place in the Half-Life universe and you take the role as Gordon Freeman. Your journey begins in an unknown location.

Aperture Science Laboratories: A Portal 2 Mod
Created by Chris "Fred"
Aperture Science is a mod for Portal 2. It is about an office worker named Harold who finds himself in the future. Not knowing anyone there, he finds on of his old robot prototypes by the name of CHRIS and turns him on. They then go on an adventure through...
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marnamai Jan 13, 2017 @ 7:10am 
raistlin Dec 11, 2016 @ 10:23pm 
[Greenlight]3DMMOACT“Legend Hunter:Monster Quest”

Hi, friends!

"3D, Multi-Player, Real-Time hunting BOSS, Real-Time fighting PVP" - Yes, you see are real!
"Legend Hunter: Monster Quest" is such a very unique 3D MMO ACT game!!!
If you like this game, please vote for us!

"ODYSSEY" is a science-fiction VR action game created by OXON, a famous Taiwan-based game studio.

“Future War: Reborn”is a post-apocalyptic Sci/Fi third person shooter game developed by Good Games.
UziGames Sep 13, 2016 @ 6:07am 
Hi all, please take a look at my VR horror game Marlene and vote if you like it thank you!
WizardExt Dec 22, 2015 @ 12:36pm 
HL2 singleplayer mod, Spherical Nightmares:
ZigZag Games Nov 20, 2015 @ 6:41am 
Check our new game: Abrix the robot:
And add it to your collection if you like it.
Parry Lee (RU) Jan 26, 2015 @ 9:24am 
Spheritis powered by unity3d
andrelgirao29 Feb 19, 2014 @ 1:04pm 
It is a Dream !