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!

Players Choice - Mod of the Year

Players Choice - Mod of the Year

Feature 115 comments

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

A Year in Review - July

A Year in Review - July

Feature 4 comments

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.

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Research and Development Patch - Source SDK 2013

Research and Development Patch - Source SDK 2013

Patch 8 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 54 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.

Post comment Comments  (70 - 80 of 771)
Hazama15
Hazama15

I expect to see a sequel the ending was perfect for one. I did get frustrated at times but overall a great mod.
If there was a sequel i would definately play it too.

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ferdyfist
ferdyfist

Best damn singleplayer mod I've everplayed!
Wow, just wow!
10/10

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chrisc44890
chrisc44890

when the fast zombie breaks out of its cage (picture shown on the news article) my game freezes, what do i do?

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asdfzxc
asdfzxc

Is the password for the cube fixed? The lights don't work anymore so I can't solve the puzzle normally.

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ProKamikadze
ProKamikadze

It's a must play for mods industry...

Reply Good karma Bad karma+3 votes
Mario787
Mario787

Only one question remains: When will Research and Development 2 be released?

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jackh902
jackh902

didnt know the was going to be a R&D2

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bob137
bob137

best hl2 mod next to garry's mod!

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jackh902
jackh902

sort your priorities out

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Rikachu
Rikachu

I do sure hope for a sequel. Maybe. Possibly.

I talked about this game on my profile, despite it being such a long time since this mod was released. This is one of the best puzzle mods for the half life 2 engine; and if the developer is still lurking here I want to thank you for delivering such an amazing mod.

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Half-Life 2: Episode Two
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9.6

1251 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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