Science and Industry is a teamplay mod for Half-Life, in which players assume the role of Security Officer in one of two rival corporations striving for domination in the cutthroat world of chemical and weapons research and development.

As security officer, it is your job to acquire and protect your company's most valuable human resources -- scientists. Scientists conduct research and develop new products, bringing your company profit. Conveniently, the products your company's scientists develop take the form of new weapons that you and your fellow security officers can use to pound the other company into submission.

Your company needn't be happy just letting it's small staff of scientists toil away at new developments when there are plenty more scientist resources ripe for the picking at the competition. Stealing scientists from your rivals is a great way to boost productivity and keep those new weapons coming, but of course your competition has the same tactics in mind. So defending your company's scientists is just as important as "finding" new ones. Of course, the vagaries of particle physics are difficult to ponder in the middle of a firefight, so if you expect your scientists to be productive, you'd better keep the fight as far from them as possible.

A Selection of Features:

- Interaction with NPC's in multiplayer -- scientists inform you of their needs, and what they think of your performance.
- Profit based not frag based -- the company with the most cash on hand and the most bleeding edge technologies wins.
- Death comes with a price -- instead of respawning players are brought back to life with expensive cloning techniques, which will cost your company cold, hard cash.
- Dynamic game balance -- each round begins with only the most basic weapons, and each team gains access to new weapons based on the success of their research facilities.
- Consistency of design and theme reminiscent of single player experience
- Custom "2 Fort"-style maps
- And much, much more... (No, really!)

Science & Industry 2 now in the works, find it at moddb at

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A new version of the oldschool teamplay mod for Half-Life Science And Industry has just been released. For those unfamiliar with the mod, S&I is a unique game where two corporations compete for control over scientists to grant them new technologies, upgrades, and ultimately to make more profit.

This new version features its share of additions with new movement techniques, an updated HUD, a new announcer, support for alternative game modes, as well as weapon balance changes and bug fixes. The full changelog is available on the Science & Industry website.

Three tutorial movies have been made to make it easier to discover the game: they show the basics, the movements and the weapons and devices.

Here are some screenshots from the game:

User Posted Image User Posted Image
User Posted Image User Posted Image

Download links for the new version are available on the Science & Industry website.

Science & Industry 1.1 Tutorials

Science & Industry 1.1 Tutorials

9 years ago News 1 comment

One thing we are trying to achieve with 1.1 is to make the game easier to get into for new players. This will be done firstly by having a quick guide...

Science & Industry 1.1 in development

Science & Industry 1.1 in development

9 years ago News 6 comments

A new update to is currently in development. This new version mainly focuses on bug fixes and research balance, but it also features a few noticeable...

SI 0.97b Released!

12 years ago News 0 comments

Science and Industry 0.97b has been released a some new things include: -New maps: si_deep (Chaos), si_depot (Chaos), si_forge (RhoadsToNowhere), si_movealong...

v0.98 Beta 4 Released

13 years ago News 0 comments

Yep its testing time again. Details in Papasnewbags forum post for downloads, etc. Heres a fix list for those of you not interested in testing. * Ported...

The S&I 1.1 Server archive

The S&I 1.1 Server archive

5 years ago Server 0 comments

Only download this file if you are a server admin, contains both Linux and Windows binaries.

The S&I 1.1 full installer

The S&I 1.1 full installer

5 years ago Full Version 5 comments

This will install Science & Industry 1.1 on your computer. The file includes everything you need to play SI.

Post comment Comments  (0 - 10 of 64)
TheUnbeholden Sep 30 2015 says:

Its been updated a week ago. The changelog is at

Full download:

+2 votes     reply to comment
HALOguy1234 Mar 25 2015 says:


+2 votes     reply to comment
GlitchyMerz Mar 7 2015 says:

I noticed this mod updated its screenshots back in Jan, and that there's a 1.2 beta testing server out there. I was a big fan of this in the early days and if this updates its definitely got whatever support I can give it.

+1 vote     reply to comment
bliztank Nov 3 2012 says:

playing science and industry on the clan server now

+1 vote     reply to comment
Prince_Dragoon Apr 26 2012 says:

can we add bots to fight aghnist

+4 votes     reply to comment
PUvala Jun 13 2012 replied:

Yes,Gravebot is the name for S&I bots

+4 votes     reply to comment
spacedcdc Nov 7 2011 says:

I have some installation instructions for 1.1 on Steam at https colon //www dot kurobean dot com/node/52 - it works. I also have a dedicated server up and running. Bring it back!

+2 votes     reply to comment
biohazard50 Jun 9 2011 says:

i love this game me and my brother play it all the time, i dont use steam though, i use won2 with half life v46 msg me if your one of the few that still play this jewl of a mod, i have a small community network that a few players can still enjoy this game

+2 votes     reply to comment
spacedcdc Nov 6 2011 replied:

Also trying to play - I miss this game. Steam name is dcdc...

+2 votes     reply to comment
Shopsmart Apr 25 2011 says:

I'm looking for anyone willing to play. I can create a server and am open to pretty much any maps suggestions, not a strict admin (can say whatever you want). Just looking for people to play Vampire Slayer, Science and Industry or Action Half-life. Feel free to add me on steam my email id is or it should be under "Dave."

+3 votes     reply to comment
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Released 2006
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Science And Industry
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