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  (70 - 80 of 751)
sasasa Jul 1 2011, 11:15am says:

Guys, i need help, when i tried to exit the "Custom" awesome cart, i could not move, i could only look around, and jump. And i can even control the cart when i'm outside of it!

E.G: i can steer/forward/backward the cart with W,A,S,D (which is in the lastest video) when i'm not inside it, i can jump, look around with my mouse while the cart is going AROUND me.

+3 votes     reply to comment
sasasa Jun 24 2011, 9:05am says:

Brilliant mapping and scripting

Please, ALL OF US HERE need RaD2

+9 votes     reply to comment
Vitiligo Jun 18 2011, 5:31pm says:

Great Mod, Thanks voor making!!!!

+2 votes     reply to comment
D()E Jun 16 2011, 6:43am says:

Awesome, Just Awesome 10/10.

+2 votes     reply to comment
DEEREE May 31 2011, 2:26pm says:

This is a blast! Absolutely stunning design and lots of fun!

+4 votes     reply to comment
HDLover Apr 26 2011, 3:57pm says:

This was great. I give it an 11 out of 10. I want more please give me more.

+4 votes     reply to comment
BrianBear Apr 22 2011, 8:30pm says:

Give this a 10/10 i wached a lets play best part is that you Developed your own stuff like the car and Slo-mo

+2 votes     reply to comment
blockland2142 Apr 8 2011, 9:00pm says:

Boy, I remember the part where there was a huge toxic pit and sentries shooting at me so I had to get bullet proof glass WHILE changing the train track thing, ALSO this part SUCKED, Once I fell of the cart and it saved RIGHT there so I saved, died, loaded, died, loaded, died, it was innoying, otherwise, VERY GOOD MOD! One of the best mods I EVER played!

+2 votes     reply to comment
Boomerbuster Mar 28 2011, 10:15pm buried:


there are so many bugs in this none of my saves stay there after i close the game when i open it agian they are gone the levels dont unlock even after i beat them i cant do anything beacuse it always glitches and either blocks off the path or what im supposed to do isnt there i even checked with my friend who has it and for me the game just doesnt workl. the way will randomly get blocked by invisible walls the gravity gun will randomly stop working this mod is a pîece of **** when it comes to accully working.

-11 votes     reply to comment
Cremat0r Jun 1 2011, 9:25pm replied:

For me and like ten thousands of others it just worked fine.

+3 votes     reply to comment
redkaos Jun 10 2011, 8:15am replied:

I did get the same problems but the whole mod can be completed within 30 minutes to an hour. I loved the mod and wish for more of it.

+2 votes     reply to comment
logzlo Aug 9 2011, 9:51am replied:

you beat it that fast? I mean, erm, yeah, it didn't take me 2.5 hours...

+2 votes     reply to comment
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Released Jul 14, 2009
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1235 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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