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Arcanum is actually pretty stable for a Troika game, but as anybody who's played it knows, there's tons of minor bugs, unbalanced items and quite a bit of unused content which simply never got patched or enabled.

Fans to the rescue. Thanks to a modder named Drog, we not only have a fully working widescreen patch, but a huge fan patch that fixes tons of issues. And the great thing is, it adds nothing that wasn't already in the game, just re-enables some things that seem to have been accidentally left out, like extra dialogue options, voice clips, and items.

WARNING: While I and many others have played through the game with these patches, they are technically unofficial, and the modder in question has said he is finished with Arcanum modding, so expect no support. Also, you MUST apply them before you start a new game, to avoid issues with incompatible saves.

Apply these in order from top to bottom:

The latest version (12/28/2009) of the fan patch. Essential. Must have. Get it here.
http://www.terra-arcanum.com/downloads/arcanum/fixes/UAP091225.exe

High-quality townmaps (Better looking in-game maps, also fixes some potential missing map errors):
http://www.terra-arcanum.com/downloads/arcanum/fixes/HQ_Townmaps.exe

And the High Resolution Patch. Weidu-based, so follow the directions to set it up for your system. Will allow you to run Arcanum at pretty much ANY resolution, provides an optional "compact" UI and optional high-res fonts:
http://www.terra-arcanum.com/downloads/arcanum/highres/HighRes1.1a.exe

Version: 1.5.1 (October 4, 2019): http://terra-arcanum.com/drog/uap.html#download

And that should set you up real nice. If you want more info on Arcanum, or any of the other Troika games, head to http://www.terra-arcanum.com and have a look around. Note that they also have some other mods and things for Arcanum, but most of them significantly alter the core game, or are incompatible with the UAP bugfixes. You might want to give the high-quality music patch a spin, but the original music sounds excellent and I wager you won't be able to tell much of a difference. For the purest and most hassle-free experience I recommend you stick with these patches for your first playthrough.

EDIT: If you have any problems with not being able to download, try refreshing the download page, or try the alternate links at this forum post (thanks sanpats), or for the 91225 update and High-res patches try these alternate links, courtesy of Petrell: UAP91225 update and High-res patch.

EDIT 2: Removed old patch version, as apparently version 91225 is stand-alone. Vagabond says it is anyway. Blame him if it breaks.

EDIT 3: Removing contributed torrent link due to torrent site jumping the shark.
Post edited October 16, 2019 by Irrehaare
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satyrmode: Is there a link for those that doesn't require watching a Flash video?

I mean, I'd watch an ad to pay their hosting, but I'm not going to install flash just for that...
The download link is in the page's HTML code, right above the flash video. Ends on .hash, save it as .exe
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satyrmode: Is there a link for those that doesn't require watching a Flash video?

I mean, I'd watch an ad to pay their hosting, but I'm not going to install flash just for that...
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Lightbringer: The download link is in the page's HTML code, right above the flash video. Ends on .hash, save it as .exe
Trying to download it gives me the BadLink.html, could a helpful person maybe mirror it somewhere? :)
High resolution patch should be swapped with this one: http://www.rpgcodex.net/forums/index.php?threads/arcanum-high-resolution-patch-version-1-5-release.115869/
Is anyone able to get this running at 1920 x 1080 fullscreen or above? My goal is 2560 x 1440 fullscreen, but the most I can do is 1920 x 1080 windowed.

On v1.1a I used to be able to run 2560 x 1440 fullscreen, but I reinstalled the game to switch to this newer widescreen patch for the Half-Ogre Island fix. Seems a mistake, and now using 1.1a I am limited to 2560 x 1440 windowed (still higher than what 1.5 allows me though).
Post edited July 09, 2017 by boredgunner
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boredgunner: Is anyone able to get this running at 1920 x 1080 fullscreen or above? My goal is 2560 x 1440 fullscreen, but the most I can do is 1920 x 1080 windowed.

On v1.1a I used to be able to run 2560 x 1440 fullscreen, but I reinstalled the game to switch to this newer widescreen patch for the Half-Ogre Island fix. Seems a mistake, and now using 1.1a I am limited to 2560 x 1440 windowed (still higher than what 1.5 allows me though).
It works on 4K: http://imgur.com/a/3RHrm
http://www.rpgcodex.net/forums/index.php?threads/arcanum-high-resolution-patch-testing.115792/page-2#post-5165583

Talk with Drog in the thread (he replied to you).

But isn't such high resolution too much? Characters are tiny (even on a 50 inch display).
Post edited July 09, 2017 by goral
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goral: It works on 4K: http://imgur.com/a/3RHrm
http://www.rpgcodex.net/forums/index.php?threads/arcanum-high-resolution-patch-testing.115792/page-2#post-5165583

Talk with Drog in the thread (he replied to you).

But isn't such high resolution too much? Characters are tiny (even on a 50 inch display).
Maybe another GPU driver will help. Characters are indeed small although I guess I've gotten used to it.

- EDIT: No help on either Windows 7 or Windows 10. 1080p windowed is as high as the high res 1.5 patch will go.
Post edited August 07, 2017 by boredgunner
Not to cause any confusion for the OP - I have added the link to Arcanum High Resolution Patch newest Version: 1.5 (June 20, 2017) : http://terra-arcanum.com/drog/highres.html#downloads to the original post.
Post edited July 12, 2017 by padlinka
i recommend replacing ddraw.dll with the wine emulated ddraw.dll as well. it will remove any slowdowns and make the game run smoothly all the time.

look up ie_ddrawfix is a page how to fix baldurs gate but the fix will work on arcanum as well.
Hey.
I'm having trouble trying to install the Fan patch.
You know, Unofficial Arcanum Patch v091225.

I keep getting these errors while the installers doing its works, like this:
[i]Error opening file for writing:
C:ProgramFiles(x86)\Arcanum\Arcanum.exe[/i]

In fact, it has trouble opening a whole load of files.
Am I the only one having this problem?
Attachments:
error.jpg (62 Kb)
Ok so I got the high res patch and uap installed but when I try and run the game it stops working any solutions?

NVM got it working had it set to windowed mode which i guess it didn't like.
Post edited August 28, 2017 by Digglefig22
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BlackNoise: Hey.
I'm having trouble trying to install the Fan patch.
You know, Unofficial Arcanum Patch v091225.

I keep getting these errors while the installers doing its works, like this:
[i]Error opening file for writing:
C:ProgramFiles(x86)\Arcanum\Arcanum.exe[/i]

In fact, it has trouble opening a whole load of files.
Am I the only one having this problem?
Rule #1: Don't you never, ever install games in Program Files folder. Never.

Reinstall the game somewhere else, for example C:\GOG\ or C:\games\ or on a separate partition. Then you shouldn't have any trouble with patching, updating or modding.
I am not sure if this is the right place to put this, but I'm on windows 10 and I had some graphical glitches when
the crash site loaded (see attachment).

You can fix it by setting the game to run in compatibility mode for Windows 7 and set the -no3d -doublebuffer flags
on the program or shortcut.

Other than that, the GOG support page is awesome, it's so clean and readable!
I know the store page doesn't include windows 10 as platform, but I hope this solution can be included somehow.
Attachments:
glitch.png (130 Kb)
Post edited September 21, 2017 by guncastle
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Lightbringer: The download link is in the page's HTML code, right above the flash video. Ends on .hash, save it as .exe
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cwagner: Trying to download it gives me the BadLink.html, could a helpful person maybe mirror it somewhere? :)
I have the same problem (no flash, digging in the code doesn't work for me), so I am seconding this. :)

By the way, those guys should really fix their download page. Mandatory flash in 2017 should be illegal or something.
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padlinka: Not to cause any confusion for the OP - I have added the link to Arcanum High Resolution Patch newest Version: 1.5 (June 20, 2017) : http://terra-arcanum.com/drog/highres.html#downloads to the original post.
Something I've just noticed - you should delete the part directing to 1.1 patch. If one were to install 1.1 and then 1.5 he will mess up the game and the OP suggests to install the patches in exactly this sequence. Just swap the links, it's OP's fault that he doesn't frequent GOG anymore.
Post edited November 08, 2017 by goral
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carlosjuero: The only download that gave me real issues was the HQ Town Maps. It wouldn't download for the longest (no matter how many page refreshes), and then when it finally did the archive apparently got corrupt. Ah well, I have the rest of the important mods.
Actually you never got the archive, you downloaded the html page labelled as the archive.
I had the same problems, cant get any of the Terra Arcanum links to provide downloads, but right clicking save as, appeared to give me the files, some archived, others exe's
Archives appeared corrupt, but exe's all ended with htm extension, and sure enough opening archives in Notepad++ shows they are also html pages.

Their Forum is down as well, so no good trying there, stick to later links on here for now.
Post edited November 26, 2017 by UhuruNUru