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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.

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!

Comments  (0 - 50 of 166)
Triden007 Jul 4 2011, 10:21pm 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
Tycoon-Master Jul 4 2011, 10:25pm 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
Cypher05 Jul 8 2011, 9:04pm 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
Isimiel Jul 4 2011, 10:36pm replied:

mabey there working on a new engine?

+34 votes     reply to
Phenixtri Jul 5 2011, 11:21pm 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
Gkthepwner Jul 6 2011, 1:15pm replied:

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

+5 votes     reply to
Medevila Jul 8 2011, 3:25am replied:

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

+5 votes     reply to
TheDiddyHop Jul 8 2011, 3:04pm 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
Ice_Man_120 Jul 10 2011, 5:33am 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
Lucífer Jul 10 2011, 11:31pm replied:

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

+16 votes     reply to
Ice_Man_120 Jul 21 2011, 4:21pm 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 Object. Open your eyes before you type.

-7 votes     reply to
Medevila Jul 11 2011, 9:34pm 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
Ice_Man_120 Jul 21 2011, 4:23pm buried:


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

-5 votes     reply to
ThatOGDon Jul 14 2011, 6:58pm 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
yoyobeerman Jul 15 2011, 11:11pm 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
At0M1c Jul 17 2011, 4:07am 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
TrashCan-Man23 Jul 4 2011, 10:41pm 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
Also_known_as_Peter Jul 4 2011, 10:41pm replied:

Ding a-ding! New engine!

+27 votes     reply to
Brainles5 Jul 5 2011, 2:11pm 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
Spr09 Jul 4 2011, 11:02pm 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
Amez Jul 5 2011, 12:26am replied:

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

+40 votes     reply to
SPTX Jul 5 2011, 8:52am buried:


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

-26 votes     reply to
PROGRAMREBELLEN Jul 5 2011, 10:04am replied:

Because its a game? lol

+20 votes     reply to
Bäver33 Jul 5 2011, 11:25am replied:

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

+5 votes     reply to
PrivRyan Jul 5 2011, 1:52pm 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
rorios Jul 7 2011, 4:41pm replied:

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

+6 votes     reply to
BenQ3000 Jul 5 2011, 9:01pm 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
jo291 Jul 6 2011, 6:22pm 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 Object sense.

I can hardly even understand your comment to begin with.

+19 votes     reply to
Ice_Man_120 Jul 10 2011, 5:38am 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
rorios Jul 7 2011, 4:46pm 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
MorshuLoL Jul 16 2011, 4:56am replied:

Meanwhile at Activision...

+5 votes     reply to
[Electron] Jul 25 2011, 8:35pm replied:

Maybe because your an idiot.

+2 votes     reply to
AaronLewis Jul 4 2011, 11:55pm replied:

Haha There not making a new engine, there just upgrading the last one constantly. They will be releasing the current source engine but they probably have a far more advanced version themselves that they are using. Valves Smart.

TBH the whole free to play TF2 is very smart. It will increase the sales on steam dramatically.

+14 votes     reply to
Whizzard Jul 5 2011, 6:54am replied:

I think there will be no Episode 3 for Half-Life 2, I think they are going straight for HL3 since there hasn't been any word on Ep3 for years.
That said, they most probably will use a new engine for HL3.

+8 votes     reply to
DeadSomething Jul 5 2011, 9:17am replied:

if they make it on a new engine, i hope it doesnt require DirectX10 or 11 or at least they make it selectable, so you can still play it with newest dx9. they shouldnt all go in for microsofts greed on selling win7.

+2 votes     reply to
PROGRAMREBELLEN Jul 5 2011, 10:05am replied:

Well, you can play with Direct X 8 in the latest engine, so if they really do 10 or 11, Im sure theyre gonna support 9

+4 votes     reply to
Medevila Jul 8 2011, 3:28am replied:

LOL No. If it takes as many years from HL2 to HL3 as it did for HL1 to HL2, then I want it to be the best it can be. Backwards compatibility should be an afterthought.

+1 vote     reply to
Argoon Jul 29 2011, 2:34pm replied:

For your information Dx11 supports dx9/dx10 Gpus, but tessellation only works on dx11 cards, to play a dx11 game with a dx9/dx10 GPU you only need to have vista or windows 7. If you are still on WinXP them is time to update, and BTW you don't need to "buy" the OS. ;)

Making a dx9 render with dx11 features on top only makes the engine harder to maintain and the dx11 features to run bad. A pure dx11 engine runs much faster them a dx9 engine and supports the same features plus more.

+1 vote     reply to
X-LAyer2 Jul 5 2011, 10:35am replied:

Valve has said that they will not create a new engine for a long time to come and just make improvements on the Source engine.

+2 votes     reply to
Velmarshal Jul 5 2011, 7:06am replied:

Well it only managed to shake the CS off its throne, on which it was sitting since the beginning of steam. Oh and yeah, there's the quadrupling of sales and players. xD

+1 vote     reply to
Lucífer Jul 10 2011, 11:35pm replied:

Aperture Science = Exaggerated View of Valve

+4 votes     reply to
JoshZemlinsky Jul 5 2011, 1:46pm 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
SteveZombie Jul 17 2011, 6:59pm replied:

Are you trolling or just stupid?

-2 votes     reply to
adliikhwan Jul 26 2011, 7:36am replied:


0 votes     reply to
MajorBanter Jul 29 2011, 5:57am replied:

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

+1 vote     reply to
orkenuu Jul 30 2011, 4:49am replied:

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

+1 vote     reply to
SiPlus Aug 18 2011, 10:29am replied:

EA is Valve games retail publisher. Valve is developer.

-2 votes     reply to
wlmeng11 Apr 1 2012, 10:24pm replied:

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

+2 votes     reply to
Dman757 Jul 4 2011, 10:29pm said:

Man if only someone had posted about this last week Moddb.com


+7 votes     reply to
INtense! Jul 4 2011, 10:39pm replied:

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

+3 votes     reply to
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Released Oct 31, 2004
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Source Commercial Released Oct 31, 2004
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