alt.hn

3/28/2026 at 6:22:45 PM

OpenCiv1 – open-source rewrite of Civ1

 https://github.com/rajko-horvat/OpenCiv1

by caminanteblanco

3/28/2026 at 10:53:40 PM

> The game is still very popular and easy to play. But the obsoletness of DOS

Nothing obsolete about DOS when it comes to playing 2D games. Thanks to DOSBox and other emulators (FreeDOS is also not bad though) it is a fantastic OS (or virtual machine). DOS as a platform for (2D) games has never been better than it is today, on modern hardware running DOSBox.

by 1313ed01

3/29/2026 at 7:44:34 AM

> Nothing obsolete about DOS when it comes to playing 2D games.

Until you want better graphics, network, touch support, etc, etc.

Some people may not want that; and there are workarounds, even in dosbox itself; still, they are just that.

The page lists similar plans in FAQ: “To add additional functionalities (features) to the game (like online gaming, scalable HQ Grahics, HQ Audio, plugins, etc.).”

by thih9

3/29/2026 at 5:23:16 AM

86Box runs on modern MacOS, but is not very performant for games on ARM.

https://github.com/86Box/86Box

There are also patch sets available for modern PCs to support legacy MSDOS, and Windows 3.1/95/98/ME. Attempting to install/run on modern hardware will usually blue-screen without the workarounds. =3

https://github.com/JHRobotics/patcher9x

by Joel_Mckay

3/29/2026 at 1:24:17 PM

I'm the author of OpenCiv1 project. The main point of such project is to fix the bugs and to provide additional features. Also, there are multiple live discussions on Civ Fanatics Forums on how to modify Civ1. The people still have endless creativity for Civ1 and this is the way to give it to them :)

by rahorvat

3/29/2026 at 10:10:49 AM

What I like about DOSbox are its constraints and limitations.

Of course there plenty of good features missing but on the other hand that’s the point.

Why start in 2d when in reality you want a 3d game?

DOSbox is delivering constraints.

The demo scene died when the constraints were gone and all that was left was showing a movie. On a C64 for example there are no animations per se but maxing out technical prowess combined with design. If it matches optimally it will make you marvel otherwise not so much.

So there is no right or wrong only what do you want?

by _the_inflator

3/29/2026 at 12:55:14 PM

> The demo scene died when the constraints were gone

The problem was in my opinion not that the constraints were gone, but the fact that the PC did not provide a very stable platform anymore on which you could do some crazy low-level optimizations.

by aleph_minus_one

3/30/2026 at 12:12:00 PM

Building stable software for all varieties of PC hardware was part of the challenge of course. Lots of demos had problems with all kinds of hardware varieties.

Lots of low-level optimizations also made their way into compilers that sometimes do a better job than a human. There's not much to be gained by writing everything in assembly which means it doesn't interest people as much as in the 90s.

by bzzzt

3/30/2026 at 1:51:42 PM

> There's not much to be gained by writing everything in assembly which means it doesn't interest people as much as in the 90s.

There is a lot to be gained from writing your code in a way that makes use of SIMD instructions. Also, a lot of things that you can write in assembler code is insanely hard to express in higher-level languages, so of course

- the compiler may implement some specific low-level optimization

- but the compiler can (in general) not easily change the programming language so that low-level programming tricks can (without "contortions") be formulated in the programming language.

I agree that if the compiler was "allowed" to change the (higher-level) programming language, too, by quite a lot, so that quite a lot of low-level programming tricks can be formulated or much better formulated in it, then I would somewhat agree that the advantages of low-level coding have become smaller.

But this is currently clearly not the case.

by aleph_minus_one

3/29/2026 at 4:33:56 PM

I bought some DOS games wrapped in DOSBox on GOG, and I'm not sure if GOG uses some bad version or bad config, but it's pain the the ass - you can't resize a window to be able to actually see something on 4k screen, no obvious way to switch to fullscreen and back, etc.

It's one thing to be able to emulate DOS games (something which worked 20+ years ago), it's another thing to offer reasonable ergonomics in a modern environment...

by killerstorm

3/29/2026 at 7:38:48 PM

Yeah this is key - in order to get out of full-screen you have to find and navigate some some ini file, then its still doing the mouse capture thing, which I think is also a setting, but all this faffing about just to get it into a usable state is pretty user hostile

I want the window to be open like any other window, and the mouse pointer to work transparently in and out of it - like when I hover the mouse over the dosbox window, change the pointer but keep the same mouse speed, momentum etc

I think this would be really hard to do in an emulated environment, maybe even would require patching each game executable to get the mouse speed right (not sure?), the modern environment integration, like you say, is what Im after too

by malux85

3/29/2026 at 4:05:33 PM

You can also run the original on an Amiga emulator (or an actual Amiga, like me).

by badgersnake

3/28/2026 at 11:59:29 PM

There is a win 3.1 port for wider screens that do box will run

by AtlasBarfed

3/28/2026 at 10:55:31 PM

This is a cool project, but the author should note that they _are_ likely creating a derivative version of Civ1 here. It might look somewhat different, but that's clearly just 16-bit (?) intel opcodes in a slightly spicier form.

It's very unlikely this sort of approach will end up with a copyright-free codebase, though it might be useful as a source for a cleanroom approach. The author shouldn't be discouraged -- lots of other recompilation efforts work this was as well, but it's a muddy place to be.

by mmastrac

3/29/2026 at 1:45:13 PM

Well, the 'intel opcodes' are just a proof of concept. It was important, for me, to prove it could be done. If you look deeper in the available code there is already a bunch of code that has nothing to do with 'intel opcodes'.

On 'It's very unlikely this sort of approach...' I will say Why not?

The process of rewriting the code is that the one side is describing the functionality in details and the other side writes the 'clean' code. That's what I'm trying to do. The 'intel opcodes' describe the functionality, and I'm writing the clean code.

I believe https://en.wikipedia.org/wiki/Clean-room_design is the best practice in this situation.

by rahorvat

3/29/2026 at 3:12:16 AM

It is very likely that no one cares if anyone cares about copyright.

If someone do in fact care, I'm sure someone else can organize an online donation for them tissues those who care can cry into.

Otherwise please accept that Civ I is effectively public domain.

by lstodd

3/29/2026 at 12:36:10 PM

Nobody cares until the original company wants to release a remaster in 10 years.

by miki123211

3/29/2026 at 6:37:57 PM

Then everyone proceeds not caring like it happened with openttd recently. Or for example OpenXcom -- when those new-Xcom titles started appearing it changed exactly nothing.

by lstodd

3/28/2026 at 11:54:21 PM

There are also some folks working on a similar project for Civilization 2. https://github.com/axx0/Civ2-clone

by loganhood

3/29/2026 at 2:02:36 PM

Yes, also a great project :)

by rahorvat

3/28/2026 at 11:13:17 PM

While not exactly the same, there is also https://www.freeciv.org/

by yitchelle

3/29/2026 at 12:21:34 AM

Also worth mentioning is C-evo, even if it's not being developed further afaik

http://c-evo.org/

by ixv0

3/29/2026 at 5:17:22 AM

- civ 1 --> OpenCiv1

- civ 2 --> FreeCiv

- civ 3 --> OpenCiv3

- civ 4 --> ???

- civ 5 --> UnCiv

by culi

3/29/2026 at 2:06:10 PM

I really wish the FreeCiv team would focus on their SDL build instead of all these fiddly and very fickle UI toolkits. They have an incredibly cool hex-based hybridized Civ 2/3 ruleset that might be the best of all worlds, IF it could actually start consistently on all systems. Drop GTK and Qt, clean it up, add some modern quality of life keybinds and UI info, make it the universal target.

by netbioserror

3/29/2026 at 11:09:41 AM

I really prefer the 2D pixel graphics of the original Civ. But the middle game can be a slog due to micromanagement, e.g. loading units onto boats. I would love to see a few tweaks, fixing bugs like disappearing units, and a stronger AI that doesn't have to cheat :)

by sehugg

3/28/2026 at 9:21:53 PM

> The game logic is Based on original DOS Civilization 1 game version 475.05 disassembly.

Love more details on how this was done and the translation to human-readable code.

by tigerlily

3/29/2026 at 12:58:57 AM

This is a great idea. I do play Civ1 on my XT class machine (NEC V20 @ 10MHz, 1MB RAM, 64MB IDE, 256K Trident VGA, NE2000, Adlib) but the turn times are horrendous as this is a 1991 game being run on a 1982 CPU. Realistically, most people would have been playing on either a 286 or 386. Having the game available on modern hardware, I imagine it’d be far more enjoyable. I’ll give it a go.

by BirAdam

3/29/2026 at 10:52:19 AM

Emulators are ok

by j45

3/28/2026 at 9:54:52 PM

Since this requires some files from the original Civilization how do people obtain legal copies of the game? It's not available on Steam or GOG

(Or am I being hopelessly naïve by asking such a question?)

by indy

3/28/2026 at 10:11:44 PM

You go on eBay or similar site and you pay for a used copy on floppy or CD-ROM. Then using the appropriate tool you back those files up and use them for OpenCiv 1. Cheap, no. Convenient, no. But legal.

If you're lucky you stumble across it in a thrift store that wasn't paying particular attention and assumed it was a puzzle or a board game.

by chocochunks

3/28/2026 at 10:25:07 PM

So: Yes, hopelessly naive.

by jstummbillig

3/28/2026 at 10:55:32 PM

I still have the floppies and manual in a box in the attic. Bit of a hoarder in that way I’m afraid.

Question then is do I need to find a floppy drive to obtain the files or can I get them elsewhere.

Of course who knows if the floppy’s still work. I remember having problems with my Star Trek 25th anniversary floppies around 1996ish, and today it’s 30 years later.

by hdgvhicv

3/28/2026 at 11:06:02 PM

I mean from a legal perspective, original media is the only recourse. But if we expand the options we're willing to avail ourselves of, there's a lot of high quality backups online.

So far as I know, Take-Two Interactive is extremely lenient, especially since they don't offer any way to purchase Civ1 or 2

by caminanteblanco

3/29/2026 at 1:27:51 AM

Owning the original game does not automatically grant you right to make or use in derivative works.

by j16sdiz

3/29/2026 at 4:56:58 AM

Not exactly, but under US copyright law there is a limitation of exclusive rights that grants the owner of a copy the right to make an adaptation provided "that such a new copy or adaptation is created as an essential step in the utilization of the computer program in conjunction with a machine and that it is used in no other manner". Unfortunately, the law doesn't specify what "adaptation" means, and I'm not sure the concept of an "essential step" stretches to cover modifying your program to run on a new OS decades after its original host platform has gone extinct.

Regardless, making such a modification for personal use only would be hard for a copyright owner to win a lawsuit over even if they could find out about it. But publicly distributing your derivative work like this is definitely violating the original's copyrights.

by wtallis

3/29/2026 at 1:59:20 PM

Well, I claim that there is no violating of Original copyright whatsoever. The repository doesn't contain any of the contents of the original game disks or any of the files. You could argue that I used a small parts of the work, but that can only fall under https://en.wikipedia.org/wiki/Fair_use doctrine.

by rahorvat

3/28/2026 at 11:12:53 PM

Can anyone give some hints on what made Civ 1 special compared to other classic entries in the franchise? Despite the nostalgia factor, of course.

by haolez

3/28/2026 at 11:59:13 PM

In my opinion, Civ1 was fundamentally simpler than any other Civ game. It is like the difference between playing DOOM and Halo. Civ 1 has very few units, very few civ types, very few anything really. That means that it is easy to keep the whole game in your head at once. For me, its a totally different experience.

by caminanteblanco

3/29/2026 at 3:40:24 PM

I played a lot of Civ1, Colonization and Civ 2. First time I tried Civ 3 I lost some city due to some culture or religious influence and ragequit (I was also working my first job at that point so didn't have as much time to spare).

Played a bit of Civ 4 and 5(or 6?) but never was really as hooked on them.

by whizzter

3/29/2026 at 6:48:31 AM

It's simple (both in terms of gameplay and graphics) and it's the fastest Civ game to complete a full playthrough. Later releases made the game slower and more complex.

by SL61

3/29/2026 at 2:12:06 PM

1. It was the first civ.

2. The Settler unit was a big eared bat

by TiredOfLife

3/30/2026 at 8:33:09 PM

> The Settler unit was a big eared bat

You validate my feelings. I always knew that at heart.

by kubanczyk

3/28/2026 at 11:15:33 PM

Honestly it feels to me that Civ1 - Civ2 is the most direct upgrade in the series. Civ 2 was mostly just a better civ 1. From civ4 onwards, the series was a lot more willing to shake things up in its gameplay.

by Macha

3/29/2026 at 5:06:14 AM

Civ 2 was without doubt a much uglier civ 1, though. Isometric graphics in win 3.11 wasn't a good bet.

Civ 1 had good pixel art (look at those mountains! Not to mention the intro), good colors (and more of them!) and clean iconography. For me the look was part of the magic, so I never got into Civ 2.

by vintermann

3/29/2026 at 7:28:47 AM

I considered Alpha Centauri as the sequel, both in the continuation of Civ 1s final goal and the expanded gameplay.

by antihipocrat

3/29/2026 at 12:51:48 AM

Civ 3 already started to shake things up.

by Narishma

3/29/2026 at 12:17:38 AM

"OpenCiv1 uses .NET 8 and Avalonia UI framework" So.... way bigger filesize than the original game + dosbox running on a html server?

Nice exercise though, but I'll stick to the original.

By the way CivNet (civ1 + networking for Win 3.11) runs perfectly in Wine

by ixv0

3/29/2026 at 3:42:56 PM

Avalonia is a native UI toolkit (kinda WPF inspired).

by whizzter

3/29/2026 at 3:18:52 PM

I'm looking for similar colonization rewrite. FreeCol lacks that retro look and feel

by p0w3n3d

3/29/2026 at 3:31:54 PM

It's on that list of things I would've love to do with infinite time. Especially as it actually had a hotseat multiplayer-mode that would be awesome to put in a networked context (iirc it might've been a hack enabled with a hex-editor but it was fun).

by whizzter

3/29/2026 at 8:41:04 AM

I'm commenting this blindly so apologies if I'm wrong, but if it's possible I'd try and compile this against .NET Framework 3.5 instead of .NET 8.

A lot of people (myself included) have XP/7 machines for retro games like Civ1 and I'd personally love to use that machine instead of my modern one to play the game.

by thomasmarton

3/29/2026 at 9:20:37 AM

Without looking at the codebase, I can already say this is a big ask because it uses the Avalonia framework for cross-platform deployment. .NET Framework 3.5 is Windows-only, and there was a heap of massive breaking changes when the .NET Framework was replaced by the superior .NET Core (now just .NET), so it would be a pretty big maintenance burden to try to maintain a separate build target for that.

by applfanboysbgon

3/29/2026 at 2:04:21 PM

For Win 7, you can easily compile with .NET core 6 and Avalonia framework for .NET core 6.

I have tested it and it works :)

by rahorvat

3/29/2026 at 12:45:44 AM

We got civ 2, civ 3, and civ 1.

But when will we get the greatest civ ever, civ 4?

by polski-g

3/29/2026 at 2:16:15 PM

Those who like civ 4 are playing civ 4. Even with dll mods it works great in linux

by TiredOfLife

3/29/2026 at 12:37:26 PM

Nice one! Wish someone would make a browser based version a la Chronodivide's RA2

by port3000

3/29/2026 at 12:19:49 AM

Is there anything similar for Civ IV? So many top tier mods break after a while due to the same memory issues.

by Tarks

3/29/2026 at 12:02:01 AM

I love how obsessed HN is with civilization. I put over 1000 hours into Civ 5 alone and was proud to beat diety (and then consistently beat diety). It's funny how many founders are big on civ. Zuck and Elon both apparently spent a lot of time during college on the series.

by danielparsons

3/29/2026 at 11:54:19 AM

https://github.com/Solen1985/CivOne

Worth mentioning this one also

by krb5

3/29/2026 at 4:48:48 PM

Sadly :( It was abandoned years ago...

by rahorvat

3/28/2026 at 11:58:54 PM

Is there a similar project for Masters of Orion?

by leptoniscool

3/29/2026 at 12:03:19 AM

There's another recommendation that I haven't tried, but I've played a bunch of https://rayfowler.itch.io/remnants-of-the-precursors and can recommend it.

I wish there were one for MOO2, though. With some modern rebalancing...

by GauntletWizard

3/28/2026 at 11:28:20 PM

Looks like C# completely taken over gamedev.

by wiseowise

3/29/2026 at 9:47:50 AM

No, but it has always been huge.

by orphea

3/29/2026 at 11:10:10 AM

[dead]

by hyi96

3/28/2026 at 10:05:39 PM

Time to pimp up my throne room

by dvh

3/29/2026 at 12:14:29 AM

In Civ 1 you bring ameliorations to your palace, not throne room. Please hand in your geek card.

by ixv0

3/29/2026 at 11:18:33 AM

[dead]

by pugchat

3/29/2026 at 12:46:24 PM

[dead]

by damotiansheng

3/29/2026 at 12:44:10 PM

[dead]

by damotiansheng

3/29/2026 at 2:32:38 PM

[dead]

by 0xkilroywashere