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  (0 - 10 of 765)
Guest1982 Apr 21 2015, 1:31pm says:

Background error too :[

+2 votes     reply to comment
Poren-Mordecai Apr 8 2015, 2:52pm says:

were is background
fix this

+1 vote     reply to comment
stuffedbear Mar 28 2015, 3:07pm says:

wtf? background error please fix or how to fix

+2 votes     reply to comment
Gylyan Mar 15 2015, 4:55am says:

jay! "cant find background"
how funny

#no #sarcasm #bug/glitch

+2 votes     reply to comment
Dune_Jumper Feb 5 2015, 10:43pm says:

The Steampipe fix worked flawlessly. The only problem I noticed was that the HUD was missing, which isn't exactly needed in this game anyway.

+1 vote     reply to comment
Guest Feb 4 2015, 9:56am says:

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

Gylyan Mar 15 2015, 4:53am replied:

Same problem here!

+1 vote     reply to comment
roseniusm Jan 30 2015, 5:28pm says:

WoW! Just finished it and I LOVED it. Was a bit unsure about it in the very beginning, but it quickly grew on me. Worked flawlessly on my pc, no probs at all. This will definitely be replayed, I kid U not :) The ending was epic btw and left me with a big smile :D

+1 vote     reply to comment
DarkElf9727 Feb 1 2015, 3:14pm replied:

I also replayed it recently, so much ingenuity in this mod, I only wish it was longer, or there was a sequel. 10/10

+2 votes     reply to comment
Dune_Jumper Jan 24 2015, 1:21am says:

Why does Mod DB say this just updated?
Weird, a ton of mods say they were updated but aren't actually. How bizzare.

+7 votes     reply to comment
TheUnbeholden Jan 28 2015, 9:28pm replied:

They where listed incorrectly as HL2 mods, now they are under HL:Ep2. They specifically require it to run.

+1 vote     reply to comment
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Half-Life 2: Episode Two Icon
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Release Date
Released Jul 2009
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1244 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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