Double Helix

for Opposing Force

17th November 2012

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Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3

Starting just outside the base, you need to get a vest and get fighting.

There are plenty of locations to pass through, with regular mission updates throughout.

Reach the waiting aircraft and fly to freedom.

Background (from README.txt)

17TH SEPTEMBER 20 – MESSAGE FOR: AGENT SHEPHERD

ADRIAN,
WE AT THE UNIT ARE GLAD YOU DECIDED TO JOIN US, RATHER THEN SPENT A FEW MORE MONTHS IN CONFINMENT. YOUR MISSION, WHICH YOU WILL ACCEPT, IS TO INFILTRATE THE BASE OF THE TERRORIST ORGANIZATION KNOWN AS ‘DOUBLE HELIX’.

THEY HAVE BEEN LINKED TO A NUMBER OF RECENT THEFTS AND SABOTAGE OPERATIONS IN SCIENTIFIC ESTABLISIHMENTS ACROSS AMERICA. MOST RECENTLY, THE ORGANIZATION KIDNAPPED 5 OF THE WORLDS TOP GENETIC RESEARCHERS. YOU MUST RETRIEVE THESE SCIENTISTS WITH DUE HASTE.

BE WARNED, THE ORGANIZATION IS A VERITABLE ARMY THAT BEEN RECIEVING FUNDING FROM SOME UNKNOWN BENEFACTOR FOR SOME TIME NOW. FURTHERMORE, WE BELIEVE THE GROUP HAVE BEEN CONDUCTING A NUMBER OF ILLEGAL GENETIC MUTATION EXPERIMENTS. YOU MUST STOP THESE IF YOU CAN.

AFTER YOU HAVE INFILTRATED THE FACILITY, BACKUP FORCES WILL ENTER THE REAR ENTRANCE OF THE BASE AND RENDEZVOUS WITH YOU. GOOD LUCK, YOU’LL NEED IT.

OFFICE OF THE ADMINISTRATOR,
THE OMEGA UNIT

Basic Details
  • Title: Double Helix
  • Filename: of-sp-double-helix.7z
  • Original Filename: dhelix.zip
  • Size : 2.65MB
  • Author: Richard Hamer
  • Date Released: 27 May 2001
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Installation Instructions

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Screenshots

Click on the thumbnails below to open a 1024 pixel wide image.
WARNING: The screenshots contain spoilers.

Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3 Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Single Player First Person Shooter Maps and Mods for Half-Life 1, 2 and Episodes 1, 2 and 3
Reader Recommendations
Avoid It!
Think Twice
Maybe
Play It Later
Play It Now!
10 recommendations, average score: 3.9 (out of 5), standard deviation: 0.69 (what's that?)
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Meta Review Data
Statistics based on 8 comment(s) with meta review data.

Installed:
Using Gauge: Users
Manually: 2 Users
Time Taken:
Average: 0 Hours, 34 Mins
Shortest: 0 Hours, 17 Mins by Dmitry
Longest: 0 Hours, 52 Mins by PlanetPhillip
Total Time Played: 4 Hours, 29 Mins
Categories (?)
OF Maps Opposing Force Play
Tags (?)
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Favorite Map Labsplay_later
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Maybe?Phillip says Play It!Maybe?Play It Now!Play It LaterMaybe?Play It LaterMaybe?Play It Now!Play It Later

11 Comments

  1. piledriver
    Maybe?

    OK, got it working.
    Average mod. Fairly easy. Not much in the way of textures or interesting environments. Mostly grunts to kill, a few aliens. Grunts spawning in illogical places, and where they’re not needed. Good firefight at the end that you can prolong, before you escape. About 15-45 mins on skill 3. Worth the download.

    Reply
  2. Ten Four Reviews

    Double Helix is a typical Opposing Force offering set in the Black Mesa that 99% of maps just can’t get away from. Lots of same-old content. If you’ve played any number of Half-Life/Opposing Force maps, you pretty much already know what to expect—the traditional visage of offices, labs, warehouses, etc. Of course there are some original settings too, but they’re just not too common. Level design is a good, standard effort though—not big on the details, but certainly not ignorant to lack of detail & variety. Slightly above-average, in fact.

    Gameplay is in classic Opposing Force style. You’ll get to use a number of its unique weapons (but not all of them, unfortunately) to fight even more of its unique aliens, particularly the shock troopers and pit drones. However, some more usage of Opposing Force’s enemies (particularly the Black Ops) would have added a lot to the experience. Too much reliance on the base HL enemies. Still, combat is engaging, with a variety of scenarios and ideas. A few particularly tough moments, but nothing skilled players won’t be able to handle.

    It’s kinda rough around the edges and far too typical, but Double Helix is good nonetheless. Certainly one most players won’t be disappointed with, since it doesn’t commit any serious grievances (it even uses the CD soundtrack), but it has plenty of room for improvement. Worthwhile as a diversion.

    Note: the “mock” Readme in the FilePlanet copy was written by yours truly; the author’s original Readme can be found in the PAK file.

    Notes
    This review was originally published Wednesday, 6th November, 2002 by Calyst.

    This review was originally posted on the Ten Four website, which is now offline. The full review is republished here by permission and more details can be found on the About page.

    Reply
  3. PlanetPhillip
    Phillip says Play It!

    I actually quite enjoyed this one, even though there were too many level changes in the most awkward places.

    I’ll be honest and admit I didn’t bother to read the author’s intro notes – I never do.

    I’m not sure what went wrong but I had to cheat with the part with the engineer. I’m not sure if I was supposed to “use” him but he kept killing me and I had almost no health left. Sometimes with just one shot, too!

    Anyway, all in all it was quite fun and I think you may enjoy it too.

    Installed:
    Using Gauge
    Difficulty Played At:
    Easy
    Playtime:
    52 Minutes
    Reply
  4. EmoLevelDesigner
    Maybe?

    This time we attack a terrorist organization. We use rope to climb over the fence, carrying nothing with us, hoping to get armor and weapons inside. Excellent hope, very reasonable.

    And here’s our first find – heavy wrench! If you go back, you’ll notice that other side of metal door is textured wrongly.

    We get through simple outdoor area where one of Barneys attack us to corridor. The corridor is taller than the wall, so you can see it from the outside.

    The changelevel turns us left :\

    The design is simple, but has embellishments sometimes. It is also various. But we often meet ugly stretched textures. Killing Barneys doesn’t feel right, because I’m used that they’re friendly. It gets better when soldiers appear. Battles are challenging in an interesting way – every battle is a puzzle, where you have to find right strategy to solve it. Later there are easier fun encounters with aliens.

    There’s a fun puzzle in the storage – I quickly understood that I [spoiler]need to drop a crate on something in order to be able to get to the grate.[/spoiler]

    Elevator doors have elevator wall textures, some door textures in the underground tunnel are turned wrongly. And if you stand in the doorway when door tries to close, its sound will loop endlessly. There’s a room where light z-fights with ceiling. Elevator switch is giant. When the elevator goes down you can see ninjas who appear out of nowhere. In the outdoor area there are unrealistic invisible walls.

    This could have been a nice mod if the author wasn’t so neglectful.

    Installed:
    Using Gauge
    Difficulty Played At:
    Medium
    Playtime:
    31 Minutes
    Reply
  5. Hec
    Play It Now!

    Well this maps are getting better it seems…, this mappack was one I enjoyed particularly because the combat was great the layout was clear and it really feels like an OpF mod, I mean the whole feeling is that, many OpF maps feels like between HL1 and OpF, this is pure OpF, so thats really cool, also the escape last battle was perfectly fit in there.

    I recommend you to play this as is a quite better improovement from the whole plain and dull maps for OpF available.

    Installed:
    Using Gauge
    Difficulty Played At:
    Medium
    Playtime:
    45 Minutes
    Reply
  6. Bolx
    Play It Later

    I really wanted to like this one, it started OK, BUT!

    I had to manually load two maps? It started fine, however I vaguely remembered playing this before and got stuck at the first lift, I could get in and I could get out but it went nowhere! I tried beating the S#!t out of everything walls/floors/doors/switches etc, pressing everything walls/floors/doors/switches etc.

    The second time was after the encounter with the ninja’s and black-ops, nowhere could I find the trigger to the next map. Both of those may be down to me, but if so there should have been some clue.

    OK, it looked nothing special but with the gameplay that’s available it is fun in parts. One of the puzzles I did like was having to move the table and sofa to find the vent. Furniture in the HL series is usually immovable.

    Installed:
    Using Gauge
    Difficulty Played At:
    Easy
    Playtime:
    40 Minutes
    Reply
  7. Dr. Amazing
    Maybe?

    This map (created by the same author of Foothold) starts off with a nice surprise showing that the Barney’s are hostile (like in Operation Firesweep) which is refreshing and really gives you a feeling that you’re one of the soldiers from Half-Life 1.

    Overall this mappack has some great mapping and set-pieces but is bogged down by some dumb beginners mapping problems (like broken level changes, wrong textures and being able to get outside the map). It also felt like it was trying to be OP4 too much (some area’s are really similar to other area’s in OP4).
    http://steamcommunity.com/sharedfiles/filedetails/?id=109046505

    Near the end, you are given a RPG that you don’t need because there are no Apaches or Gargs. Odd.

    Installed:
    Using Gauge
    Difficulty Played At:
    Easy
    Playtime:
    28 Minutes
    Reply
  8. MisterAddy
    Play It Later

    Double Helix tries to give us a twist on the format, as we try to infiltrate a “terrorist” base. For the most part this translates to a variety of office/warehouse areas, but there are also some more unique elements such as messages over radio and using Barneys as enemies. This latter one isn’t very successful, as they tend to just stand on the spot and shoot until they die. Another problem is that most of the level changes are glitchy and will probably force you to cheat.

    Gameplay was OK for the most part, but the fact I’m writing this review the day after I played it and I can’t remember that much would suggest it was nothing special! There were some nice environments and scripted bits, but the level design is quite basic and there are a lot of problems with textures being back to front or otherwise incorrect.

    I’m torn between Maybe and PIL for this one. It is fun to play and there are far worse OFNF maps but don’t come expecting the world.

    Reply
  9. Unq
    Maybe?

    This was a decent pack but it was really marred by some odd mapping choices and some poor design. I did like the overall plan of the pack: you’re infiltrating/attacking a terrorist organization so you have some clear mission goals, although these are awkwardly told to you via text and sometimes in battle so it really distracts you.

    I really wish more attention was paid to the mapping here. While some areas are well-designed and decent looking, others were downright ugly and reversed textures abound. (Hint: when there’s text, you should be able to read the text). In one point (the assassin ambush) I was able to skip the ambush trigger entirely by jumping down from the catwalk instead of taking the elevator. And in the outside crate area, the author used invisible walls to make sure you only went where he wanted you to go. Kind of cheap, and both issues should really have been apparent if this were playtested.

    And there were some really poor choices for where the level changes were, one was again right in the middle of a firefight. And one of the level changes (in the big elevator toward the end of the pack) only worked one out of five times for me, the other times it just kind of froze during the map load stage.

    Overall not a bad set, but lacking a lot of polish.

    Installed:
    Using Gauge
    Difficulty Played At:
    Medium
    Playtime:
    31 Minutes
    Reply
  10. Cardiomyopathy
    Play It Now!

    Action themed mappack fairly balanced.

    Installed:
    Manually
    Difficulty Played At:
    Hard
    Playtime:
    25 Minutes
    Reply
  11. Dmitry
    Play It Later

    Surprise! Level transition sucks, I don’t know but the first time it happen was in the first playthrough it failed just one time and I though it was just a fixed problem. It seems to be aleatory, if you’re unlucky you can be stucked in many points. So if you don’t save before the loading point you may be trapped. There’s also an alternative way to solve the problem without 101 Impulse, just get back enough distance from loading point, save and load in that point and try again, it should work.

    Installed:
    Manually
    Difficulty Played At:
    Medium
    Playtime:
    17 Minutes
    Reply

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