The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.

Post news Report content RSS feed Source SDK is free

Following the free to play release of TF2, Source SDK has been accidentally released free, and will remain that way.

Posted by INtense! on Jul 4th, 2011

This news comes a little late, but for those unaware due to the recent release of a free Team Fortress 2, the Source SDK will soon become free to use in its entirety, for everyone (confirmed by Valve's Robin Walker in this RockPaperShotgun article). The free SDK was first uncovered in our forums on the 28th of June by an enterprising young man going by the name of Riley, who just happens to be the playtest leader of esteemed Source mods Zombie Panic Source and No More Room In Hell.

This means that all Source mods, made for Valve games (we list around 1,500 for HL2 alone) may eventually be free to play, without requiring you to purchase a Valve game (thou who hasn't purchased a valve game on this site?)

Here is what Robin Walker had to say:

Robin wrote:Yep. That said, your email has triggered a process here that made us re-examine that, and we’re going to just go ahead and make the Source SDK freely available. Thanks for making us better!

When RockPaperShotgun emailed Walker for further confirmation, and he went on to explain:

Robin wrote:We are in the process of getting it all done. It’s a bit messy because we have multiple versions of the SDK, and there’s some dependencies we need to shake out. But yes, the gist of it is that we’re just going to go ahead and make the Source SDK freely available.

Nifty... share this great news!

Post comment Comments  (0 - 50 of 151)
Triden007 Jul 4 2011 buried:


Is valve quitting themselves??
What is happening to them?!
Are they offering EA games and anothers games companies a surrender?
This is soooo strange...

-104 votes     reply to comment
Tycoon-Master Jul 4 2011 replied:

Maybe once they have made a reasonable amount of money off a game, they release it for free since you most likely are going to download it anyways.

+37 votes     reply to comment
Cypher05 Jul 8 2011 replied:

Yeah, all those micro transactions (and some not so micro from the crazies) for hats, weapons, paints, packs, mapper support (which is cool, actually) and all that jazz.

+6 votes     reply to comment
Isimiel Jul 4 2011 replied:

mabey there working on a new engine?

+34 votes     reply to comment
Phenixtri Jul 5 2011 replied:

A new engine would explain why Half Life Episode 3 is taking so long.

Think about it HL1 on the Gold Source engine in 1998 and HL2 came out in 2004 on the new Source engine. So its logical given Valves history that Episode 3 will be on a brand new engine.

So think about it how could Valve make a new revolutionary engine that's better than Source and other contemporary engines? Can you? Because I cant really come up with anything and thus I can understand why Valve is taking so long with Episode 3. We know they are working on something since we can see their experimenting with games like Portal 1 & 2 with their new features.

+17 votes     reply to comment
Gkthepwner Jul 6 2011 replied:

The name's been leaked as HL3, though, so that even further strengthens your argument.

+5 votes     reply to comment
Medevila Jul 8 2011 replied:

Yeah. It'll be HL3 if it's on a new engine, to keep with tradition and all.

+5 votes     reply to comment
TheDiddyHop Jul 8 2011 replied:

It would probaly look live action :P lol no realy!! every new engine valve releases is state of the art!!

+2 votes     reply to comment
Ice_Man_120 Jul 10 2011 buried:


If i'm honest, i think they should use an engine similar to CryEngine 3, it would make HL3 amazing.

-11 votes     reply to comment
Lucífer Jul 10 2011 replied:

Nah. They should make their own engine and not use that over-hyped piece of ****.

+16 votes     reply to comment
Ice_Man_120 Jul 21 2011 buried:


I didn't say use it, I said make something like it graphics and physics wise, and an easier way of modelling out the map, cant you read you thick illiterate twat and it's not a over hyped piece of ****. Open your eyes before you type.

-7 votes     reply to comment
Medevila Jul 11 2011 replied:

@Pilchy120 CE3? No, if I had to I'd rather have it on the PC flavor of the engine, CE2.

+3 votes     reply to comment
Ice_Man_120 Jul 21 2011 buried:


CE2 is good but in my opinion CE3 is better. :)

-5 votes     reply to comment
dahakapersico Feb 22 2014 replied:

my friend they are valve and they want be oringinal no want copy other engine

+1 vote     reply to comment
ThatOGDon Jul 14 2011 replied:

That OR:
They're doing massive upgrades to the Source Engine to prepare for a full on Half Life 3.

For example, the graphics of Portal 2 are vastly superior to the graphics in Portal. Also, didn't they say that, for DOTA2, there will be "improved global lighting" and "true cloth simulation" built into the Source Engine?

BUT, then again, only Valve knows what Valve has planned...

+4 votes     reply to comment
yoyobeerman Jul 15 2011 replied:

ya that dose make sense maybe it will even be better that cry engine 3!! just imagine tf2 in source 3!!

+1 vote     reply to comment
At0M1c Jul 17 2011 replied:

Yeah i mean there was hat mysterious room sized box at E3 2011 that had the HL2 : Episode 3 logo on it and a always closed door O.o?

+1 vote     reply to comment
TrashCan-Man23 Jul 4 2011 replied:

Looks to me like they're becoming more of a distributor rather than being a developer. Just my thoughts though.

+7 votes     reply to comment
Also_known_as_Peter Jul 4 2011 replied:

Ding a-ding! New engine!

+27 votes     reply to comment
Brainles5 Jul 5 2011 replied:

Gabe Newell said in a recent interview that their not planing on making a new engine. source: Pc Gamer.
However its not necessary true. But we shouldnt expect it in a near future.

+6 votes     reply to comment
Spr09 Jul 4 2011 buried:


nah, they'll find a way to make it so you have to pay to get those juicy hl2 mods.

-50 votes     reply to comment
Amez Jul 5 2011 replied:

Sorry bud, but Valve doesn't pull crap like that, and never will.

+40 votes     reply to comment
SPTX Jul 5 2011 buried:


Well, they made you pay for L4D2... full price.

-26 votes     reply to comment
Jerkakame Jul 5 2011 replied:

Because its a game? lol

+20 votes     reply to comment
Bäver33 Jul 5 2011 replied:

Well they promised they would make you pay for game content updates, they did anyway.

+5 votes     reply to comment
PrivRyan Jul 5 2011 replied:

??? what
Valve doesn't really charge for game content, except for tf2 of course. although, everything you can buy, you can just get for free with some patience. they never really demand your money.

+7 votes     reply to comment
rorios Jul 7 2011 replied:

but L4D2 is a full game? ****ing L4D2 boycotters....

+6 votes     reply to comment
BenQ3000 Jul 5 2011 buried:


Valve never pull crap like that?
Only throwing my 20 euros to the trash. It's not crap. It's AMAZING 'cause it's being wasted by the legendary VALVE.
Don't worry Valve, you are doing the right steps to become ActiValve.
Soon we will pay for DLCs, it will move on to subscription fees, and then we will pay-per-minute for Steam.
Feel free to down this comment, you know it's true.

-37 votes     reply to comment
jo291 Jul 6 2011 replied:

So because valve is putting all sorts of things out for free and gives free updates that means that soon they will make you pay for everything?

Durr logic error.

Sorry but that makes no ******* sense.

I can hardly even understand your comment to begin with.

+19 votes     reply to comment
Ice_Man_120 Jul 10 2011 replied:

Why don't you all shut up arguing like babies and wait and see what valve are doing.

Stop being so damn petty.

-1 votes     reply to comment
rorios Jul 7 2011 replied:

??? try looking up review or try it a friends copy of a game before buying it and blaming valve that you don't like it and you can't return it. And why would giving things away free with free updates, cause them to start charging for DLC or sub fees?

"oh no! Valve are giving away a game for free, soon we'll have to pay for DLC!" what????

+4 votes     reply to comment
MorshuLoL Jul 16 2011 replied:

Meanwhile at Activision...

+5 votes     reply to comment
JoshZemlinsky Jul 5 2011 replied:

@Triden007 they still earn more then they can spend, just think about how much money they earn with the Tf2 store and the Portal 2 store (not that i own portal 2, not that i ever will. So i dont know if the stuff in there is free) Think about that, they have no reason to sell Tf2 anymore, because everyone has it. And they'll still earn good on the store.

+3 votes     reply to comment
SteveZombie Jul 17 2011 replied:

Are you trolling or just stupid?

-2 votes     reply to comment
adliikhwan Jul 26 2011 replied:


0 votes     reply to comment
MajorBanter Jul 29 2011 replied:

TF2 fulfilled it's profit margin by a long, long way. Why not make it free?

+1 vote     reply to comment
orkenuu Jul 30 2011 replied:

and the most strange thing is that THEY ARE MAKING DOTA 2 what are these guys problem

+1 vote     reply to comment
SiPlus Aug 18 2011 replied:

EA is Valve games retail publisher. Valve is developer.

-2 votes     reply to comment
wlmeng11 Apr 1 2012 replied:

That explains why no Valve games have an EA logo on them.

+2 votes     reply to comment
Dman757 Jul 4 2011 says:

Man if only someone had posted about this last week


+7 votes     reply to comment
INtense! Author
INtense! Jul 4 2011 replied:

I missed that, sorry I know i'm late to the party

+3 votes   reply to comment
Icedecknight Jul 5 2011 replied:

Don't worry all the cool kids are late to the parties ;).

+14 votes     reply to comment
Dman757 Jul 5 2011 replied:

Well it's on the frontpage this time so more the merrier!

+1 vote     reply to comment
Varsity Jul 5 2011 replied:

Excuse me? :p

I'd be interested to know which news admin didn't consider this story worth the front page...

+2 votes     reply to comment
INtense! Author
INtense! Jul 5 2011 replied:

I'm yelling at (henley) the site editor right now for missing that. This was a huge story which a few members on this site broke and we totally missed it.

+2 votes   reply to comment
BluishGreenPro Jul 4 2011 says:

The Source? For free!? Great!... only, I use Game Maker... oh well, I can still appreciate how great this will be for others!

+2 votes     reply to comment
altercuca Jul 4 2011 says:

I smell new engine coming! don't forget boys Gabe said he's working on something that gonna make today look like the stoneages!

+10 votes     reply to comment
DarkPivot Jul 4 2011 replied:

When did they say that?

+5 votes     reply to comment
Icedecknight Jul 5 2011 replied:

In the Podcast 17 interview I think.

+4 votes     reply to comment
altercuca Jul 6 2011 replied:

He said that on Portal 2: The Final Hours. And @Icedecknight on Podcast 17 they actually said that "GoldSrc" was to never be free :P which is kinda ironic :)

+1 vote     reply to comment
Post a comment

You are not logged in, your comment will be anonymous unless you join the community. Or sign in with your social account:

Windows, VR, X360, XBOX, PS3
Send Message
Release date
Released 2004
Engine watch
Start tracking
Post news
Related Engines
Source Commercial Released 2004
Related Groups
Valve Developer & Publisher with 6 members