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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RPS digs R&D

News 28 comments

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.

Research and Development released

Research and Development released

News 99 comments

Matt Bortolino's excellent HL2: Episode Two "action puzzler" has been released from nowhere!

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Players Choice - Mod of the Year

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View 2009's mod of the year, as picked by you the players.

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2009 has been a fantastic year for modding and indie gaming. With the highest amount of recorded featured releases ever on ModDB it can still go over...

WSIP: Research and Development

WSIP: Research and Development

Feature 31 comments

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

RSS Files
Research and Development Patch - Source SDK 2013

Research and Development Patch - Source SDK 2013

Patch 28 comments

This patch fixes most issues related to engine branch incompatibility and is designed to run using the latest "Beta" of Source SDK Base 2013 Singleplayer...

Research and Development (installer)

Research and Development (installer)

Full Version 55 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

Full Version 30 comments

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

Comments  (0 - 10 of 773)
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L4DTeak.
L4DTeak.

Best mod I've ever played
the final scene was EPIC.

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Adeius
Adeius

Great job! Definitely one of my favourite mods.

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sergiusyo12
sergiusyo12

I tried as best as I could to install the mod, install the patch, patch surce SDK 2013, etc. but it always brings up the following error
Gyazo.com

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bruhvocompany™
bruhvocompany™

Can anyone direct me to the link of the official Steam group?

Much obliged!

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CzarnaSadza
CzarnaSadza

Yoooo R&D is not showing up in my Games list.
It is in Sourcemods folder.
I do have Ep2 installed

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PyroScorcher75
PyroScorcher75

Anyone else having problems with Mr. Whirly? I keep trying to leave the vehicle, and whenever I do, my controls screw up. Leaving lets me jump, but all of my movement buttons are still bound to the vehicle. Does anyone know how to fix this

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Guest
Guest

Great mod.
Works great in VR and with Razer Hydra.

Thanks for this mod.

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Ninbat
Ninbat

Every single time I try to play the game, it crashes. I don't know if the patch fixes this. If it does, can someone help me with how to download a patch?

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9.6

1256 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 by Akito8

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