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 52 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  (20 - 30 of 769)
grumpy1415063161 Nov 3 2014, 8:08pm says:

Can't get it to work. Whenever I launch it, i get 'Failed to load the launcher dll. The specified module could not be found'. Googled around a and didnt find anything. Any ideas?

+1 vote     reply to comment
Guest Dec 8 2014, 10:24pm replied:

This comment is currently awaiting admin approval, join now to view.

KillerCubePlays Mar 22 2015, 5:32am replied:

how about "Can't find background image materials/console/startup_loading.vtf

+1 vote     reply to comment
TrevorMag Oct 27 2014, 5:28am says:

Played again after SteamPipe, did the SearchPaths fix. All good, until near the end, then Mr Whirly's chopper stops whirling after a while. Still chops, still makes the sound, still kills the strider, but the chopper (both when driving and in the mini-cutscenes) is fixed in one position. Not a biggie.

+1 vote     reply to comment
eternalblast Sep 20 2014, 7:28am says:

OMG this mod is AMAZING!!!!! why isn't this on steam?

+1 vote     reply to comment
EddAdrian Sep 20 2014, 8:10am replied:

did it work for you? i used the archive download and it just enters the game black screen and nothing happens. did you use the installer?

+1 vote     reply to comment
KillerCubePlays Mar 22 2015, 5:33am replied:

it stucks on a black screen, because it can't find startup_loading.vtf

i also have this problem

+1 vote     reply to comment
Dune_Jumper Aug 31 2014, 5:04am says:

Still one of the best Source mods I've ever played.

+2 votes     reply to comment
Jesko96 Jun 1 2014, 1:26pm says:

In this moment , i didn't need u to bring a zombie on the lift. In there is a glitch with the vent. U can jump on first fence and then it on vent. I guess u need it to repair this.

+1 vote     reply to comment
cchooked May 26 2014, 12:43am says:

That was SO much fun! Thanks for a great time!

+2 votes     reply to comment
Guest Apr 13 2014, 2:00pm says:

Make a sequel!

+4 votes     reply to comment
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Half-Life 2: Episode Two Icon
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Released Jul 2009
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1245 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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