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

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

(It's really quite good.)Download now!

(If you have trouble pushing buttons accurately, download the July 17th update from the link above.)

(If you can't get out of the cart, open the console and type ent_fire ui deactivate.)

Post comment Comments  (0 - 50 of 98)
Varsity Author
Varsity

I can only play this in short bursts because my computer is on its last legs, and I swear, every time I load it up to solve a couple more puzzles it gets better. :D

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Jokerme
Jokerme

And it gets better until it finishes. That's freaking. Even ending sequence is awesomely awesome...

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DuckSauce
DuckSauce

Looking good, gonna download :)

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Metalspy
Metalspy

Sounds interesting and the screenshots look great.. downloading!

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Luke_Allstar
Luke_Allstar

played it a bit and till now it's realy not bad, but i think there are some bugs
one time a guy was flying in the air and shooting on me and another time i was able to go inside a car which i had to destroy but i don't got out of it, i had to load the last savegame, was a little bit weird

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Dodomaster
Dodomaster

Ok, played it, its awesome.

Some points of critique though: I couldn't get out of the car, when I press e the animation plays(of getting out) but then I cannot move, and I am still controlling the car(only through glitching my way out, I managed to finish it).

There is also a bug when I quicksaved before the sequence where the antlion is supposed to die, but the apc never came.

Locking the antlionguards in their cages was a bit too hard(random flinging) and controlling the car was kind of annoying.

Still, it was pretty fun!

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Demonz312
Demonz312

yea i have same problem with car damn i can't move :'( . waiting for update...

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Toastmonster
Toastmonster

This is where I'm stuck. I've trapped the antlion guards, and now I need to get out of Mr Whirly in order to work the valve to open the gate. But when I press E, I'm still in control of the vehicle yet I'm not moving. :(

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SumoPower
SumoPower

You people dont know how to read? Or are you all too lazy?(If you can't get out of the cart, open the console and type ent_fire ui deactivate.)

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djaxn
djaxn

You are so awesome, Sumo. There's an apostrophe in dont. Don't you know how to spell? Or are you too lazy?

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enablerbr
enablerbr

i really enjoyed this mod. only gripe with it was controlling the vehicle. was to over sensitive to control.

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clafferty653
clafferty653

awesome just herd of it there now oh and btw hiya ducky rofl

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corigami
corigami

Single player MOTY so far.

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fantastikool1
fantastikool1

the mod does not show up on my games' list although I extracted the folder in the SourceMods directory:(

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DuckSauce
DuckSauce

did you restart steam after extracting it?

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fantastikool1
fantastikool1

of course I did, I'm not a noob to mods

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Varsity Author
Varsity

It requires Episode Two.

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DuckSauce
DuckSauce

that shouldn't affect it showing up though? Well at least I heard all that'd do is prevent the mounted content(from Ep2) not working. Giving error models and the like.

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M@ty
M@ty

No I have the same issue. If you don't have Ep2 it wont list.

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Demonz312
Demonz312

something weird i can't write code i don't see my crosshair and its hard to write code i click e on some number 9 its click me number 3 wtf? some ides? :(

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Ka!
Ka!

Type "crosshair 1" in console, without quotations of course.

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Spas12
Spas12

DOWNLOAD THIS MOD. i was a beta tester for it. :D

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DuckSauce
DuckSauce

Just finished it... everyone should bloody play this just to get to use Mr. Whirly :D and do the end battle!

Holy ****, so awesome!
Aside from the keypad part(which was solvable with crosshair), this mod is totally a 10/10!

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Squeebo
Squeebo

Downloading! Looks sweet.

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AJDominion
AJDominion

I think this is an awesome mod. The only issue I had was getting in and out of Mr. Whirley, the radius to use it was small.

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-=117=-
-=117=-

I was excited until I saw it was for Episode II.

It's so disappointing how HL2:EP2 and HL2 are seperated.

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Varsity Author
Varsity

It's almost as if they weren't released four years apart.

Reply Good karma+4 votes
Inf.
Inf.

Great mapping, great + original gameplay. Really impressed with this mod, congrats on an awesome creation :)

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treat
treat

Valve has a lot to learn from you, sir. I'll definitely be playing through this again sometime soon.

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macing
macing

I'm stuck at the part where you have to drag the resistance through a mace with your gravity gun. It' impossible and it keeps resetting altough I don't even come close to the walls.

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Spooboy
Spooboy

Anyone else having a problem using the keypads...I have to noclip it to use them.

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macing
macing

Ok I just finished it. Great mod!

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Fartingo
Fartingo

Doesn't show up on my games list, I've restarted Steam, I put it in SourceMods, and I have Ep2, what gives?

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Rafaël_De_Jongh
Rafaël_De_Jongh

if i instal it doesnt appear in my steam list yes i did put it in

D:\Program Files\Steam\SteamApps\SourceMods\

any solution to this problem ?

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Playerh3ll
Playerh3ll

Restart steam, maybe it shall work ?

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Playerh3ll
Playerh3ll

This is The Best Single Player mod of the moment, everybody should try it, it's quite easy at first, then becomes progressively more complicated.

!!! Those who have not finished the mod, DON'T READ BELOW !!!

when your are on a tram ( the platform that moves ), when the zombines drop grenades near you, At one moment I kind of Grenade-Jumped onto a roof.

You should do a bit of tweaking in the driving parts, these are quite glitchy.

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Jesternz08
Jesternz08

lots of eye candy, will try it :)

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DarkLord-pnd-
DarkLord-pnd-

What do I do in the APC bit, where antlion dies

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Playerh3ll
Playerh3ll

Put the barrels, the engine and stuff on the platform, it should solve your problem !

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DarkLord-pnd-
DarkLord-pnd-

Ive put everything I can find there, even stood my self, nothing happened.

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DuckSauce
DuckSauce

should be the wheel, the engine, the barrel and the metal bar, you don't even need to stand on it yourself just those four and it will be enough ^_^ try to make sure to put em around the center of the container.

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DarkLord-pnd-
DarkLord-pnd-

Ive just restarted the whole level, it worked.

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reverendanthony
reverendanthony

How do you get past the part right at the beginning of level four? I have literally no idea what to do -- I've gotten the large container to rotate around for no reason, and I can gravity-shock the little suspended bridge back and forth, but I have no idea how to actually accomplish anything. I can't even get off the ground floor of the level.

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DuckSauce
DuckSauce

I was stuck there for a long time as well, look around and you will (probably already found) find the switch to move a concrete block with a target on it, be sure to put it in front of the bridge which you can swing around with the grav gun.

Next, stand under the bridge and start rocking it back and forth(hit the front, when it swings back hit the back, when it's swung back to the front hit the front again, etc) until it will slam into it and then bam watch the awesome stuff happen!

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VanderOZ
VanderOZ

Great variety of gameplay! Wow, this is Valve-quality.

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Nibbled
Nibbled

Such awesome mod, completed it tho! Gameplay was awesome! Great little mod something to do while I was bored. I recommend this! + lol @ microwave part I sorta failed there ;D

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FireyLies
FireyLies

Just finished it. it was great but the controls on the Whirler were a bit of a bitch other than that the rest of the game was great some puzzles were frustrating (i actually went and got a dry erase marker and figured out the energy balls path for the gravity gun part =P) but not so difficult you got ****** off and stopped playing. so i give it a 9 out of 10 it was fun and definitely replayable

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Bloodvayne
Bloodvayne

This mod is gonna need a Prima guide. Great mod! lol..

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TheDualWorks
TheDualWorks

one of the best single player mods out there it was good but mr wheel can use some work and makea part 2

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treat
treat

I for one thought the vehicle handled perfectly considering its forward thrust came from a propeller on the front and the yaw made a lot of sense because of the horizontal fan attached in the rear. Sill a little over sensitive considering the thing was moving on wheels, but it wouldn't have been any sort of challenge had it not been as sensitive as it was.

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Half-Life 2: Episode Two
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