Research and Development is a puzzle-centric mod for Half-Life 2: Episode Two featuring an unarmed player but plenty of violent mayhem.

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28 comments by Varsity on Jul 20th, 2009

PC gaming super-blog Rock, Paper, Shotgun loves R&D! In a new review Alec Meer praises the mod as "a seismic shift" away from the norm, telling readers that it is "as must-play as an HL2 mod gets":

R&D’s hook is that it’s essentially non-combative. Yep – you go without guns throughout (bar the ol’ Gravity jobbie, but hey, that’s more about construction than destruction here). Sure, you can tell an Antlion to claw someone to death or arrange to squash men with falling girders, but you’re definitely not Edward Pistolhands. It’s an environmental adventure game, taking the irregular physics and logic puzzles seen in HL2 itself and turning them into the game itself. Mazes, gravity, exploding microwaves and fire-retardant antlion carapaces all make an appearance – it’s very much a point’n’click adventure in an FPS engine.

If you still haven't played Research and Development, which requires Episode Two, download it now!

Update: Destructoid also has a very positive review.

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Research and Development (installer)

Research and Development (installer)

Jul 18, 2009 Full Version 53 comments

Updated 17 July 2009, fixed several issues & added a dynamic crosshair when using the keypads & lab buttons. Requires Episode Two.

Research and Development

Research and Development

Jul 17, 2009 Full Version 29 comments

Updated 17 July 2009, fixed several issues & added a dynamic crosshair when using the keypads & lab buttons. Requires Episode Two.

Post comment Comments  (30 - 40 of 758)
JMChopperGunnerNL Aug 9 2013, 4:04pm says:

Can you fix some bugs and port the mod to Steampipe?

+2 votes     reply to comment
sagesh Aug 12 2013, 10:20am replied:

Well I think the mod still works fine, and it works with steampipe version of HL2 as long as you fix the gameinfo.txt by following maxexcloo's advice (you can see it here in the comments).

+3 votes     reply to comment
sagesh Aug 2 2013, 8:08pm says:

I just finished this mod, and it's really AWESOME! I would love to play a part II if there is any :P

+3 votes     reply to comment
WALKINGDEAD9 Jul 28 2013, 1:18pm says:

Find the game " Depot ' in this mod section and copy what he has into the " gameinfo " file , this helped with many games in here .

+1 vote     reply to comment
ourmagicdoctor Jul 15 2013, 8:15pm says:

Glorious mod.

+4 votes     reply to comment
maxexcloo Jul 10 2013, 9:39am says:

To fix the errors open the gameinfo.txt file in "C:\Program Files (x86)\Steam\steamapps\sourcemods\research and development" and replace the contents with everything on the following page:

Credits to the following posts:

+10 votes     reply to comment
flippedoutkyrii Jul 7 2013, 11:56pm says:

Not sure if this would be of any help for anyone, but there is a potential fix for EP2 mods here

I haven't tried it yet myself, but ya'll are free to try.

0 votes     reply to comment
saphiraDark Jul 5 2013, 7:12pm says:

GAHHH FIX YOUR GAMES AS IT IS NOT WORKING AND I CANT FIX IT GAH.........-_- i really want to play this but cant when the game will not even launch i am getting that "startup_loading files" error and when i go to download one now i am getting a "could not load library client" please fix the game and hurry some of us want to play this mode.

0 votes     reply to comment
Israphelo Jul 7 2013, 4:48pm replied:

have you notice the last article for this was in 2009? the creator doesn't give a **** cus he does not profit from this

-1 votes     reply to comment
MosquitoMan55 Jul 14 2013, 7:51am replied:

A bit harsh of you to say... You make modders seem so cold..

+2 votes     reply to comment
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Half-Life 2: Episode Two Icon
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Released Jul 13, 2009
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1239 votes submitted.

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Highest Rated (13 agree) 10/10

Let me start by saying this was exactly what I was looking for when I began looking through the hl2 mods available here. For some reason I love any puzzle elements executed in the hl2 engine and enjoyed all the little puzzles you had to solve throughout the actual hl2 game itself and R&D pretty much mixes all those great moments into one sweet package.

Research & Development pretty much a perfect mod for any fps puzzle lovers and the only thing I can hope for now is a sequel :D

Feb 28 2011, 7:36pm by Akito8

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