This fantastic little utility for the Diablo 2 game allows you to play with much higher resolutions than the standard 800 x 600.
D2MultiRes v1.01 - Diablo II Multiple Resolution Patch
For Diablo II v1.12a
This unofficial 'patch' allows you to play Diablo II in resolutions other than 640x480 and 800x600. It is, for the most part, completed, but there are still a few issues that have not been worked out. The 'patch' lets you select any resolution 640x480 or higher that is supported by your current display adapter/monitor. There are no other changes to the game other than this.
The downloaded 'patch' should consist of 4 files:
D2MultiRes.txt
D2MultiResGame.exe
D2MultiRes.dll
D2MultiRes.mpq
To install, simply copy D2MultiResGame.exe, D2MultiRes.dll and D2MultiRes.mpq to your Diablo II directory. You do not need to copy over or replace any of your files, and none of your files will be changed. At the moment, D2MultiRes only supports the GDI (windowed mode) and DirectDraw graphics plugins. If you are using Glide you'll almost certainly crash. If you're using Direct3D you'll be able to run Diablo II, but expect to see some funky graphic glitches while playing the game. To switch to DirectDraw, run D2VidTst.exe (found in your Diablo II directory) and choose the DirectDraw option. You shouldn't notice any major drawbacks for using DirectDraw over Direct3D, so for most users this probably won't be a problem.
To run, start D2MultiResGame.exe. You may use any of the normal command line options available when playing Diablo II, such as '-w' for windowed or '-direct -txt' for mods. Diablo II will start in its normal resolution, however when playing a game you will be able to switch to a new, higher resolution. To do so, just go to the Video Options menu and select the Resolution menu item. This will bring up a new panel that will list your available resolutions. Click the one you wish to play in and Diablo II will switch to that resolution.
Like I stated above, there are still a few oddities with D2MultiRes. None of these is game breaking, and you probably won't really notice them all that much:
The Direct3D plugin is NOT working. You WILL notice this if you try to play with it. I'm looking into getting it working, but I'm also perfectly happy using DirectDraw so...
The lighting for torches, monsters, etc. is a little unusual looking at the edges of the screen. I assume this has to do with how lighting is rendered - it's probably been optimized for the two original display modes and so doesn't work entirely right on other resolutions. This is a minor inconvenience at best and you'll probably stop noticing it after a bit.
At the edges of zones you'll see black borders instead of more grass, desert, jungle, etc. This is because Diablo II doesn't actually have anything to draw there.
The original resolutions weren't big enough to make those areas visible and so nothing was put in to cover them.
Now that they are visible, there's nothing there and they show as black.
Sometimes when using a waypoint or portal you may see black areas that are filled in once you start to move.
As best as I can tell, this has to do with how Diablo II populates what room you're in and what rooms are surrounding your current room. As soon as you head towards any of the black area, the room is populated and the issue is gone. Unfortunately I have found any way to correct this, but it's a minor issue.
Some of the interface isn't perfectly aligned, this is mostly because I was lazy and didn't take the time to align it. I'm not talking about the primary interface screens, though. All of that aligns correctly. I mean things such as the 'Imbue An Item' screen or when you're placing The Staff of Kings in its spot to reach Duriel.
Instead of being aligned in the center of the left half, they're usually at the top of the left half. Not that big of a deal.
The minimap might be a little funky if you have it at the smaller size and on the left side of the screen.
I have no idea why. Move it to the right side of the screen with your V key and the problem is mostly solved.
You may still a few strange things with the minimap, mostly drawing the location of a player/NPC outside of the minimap bounds. Not really a big issue, and something you'll only notice around towns.
Time permitting, I will make an attempt to fix some of these issues or improve the quality of D2MultiRes.
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Changes in v1.01
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Corrected an issue that was causing rooms to fill their object list
and render multiple times. This should great increase the frame rate
all around and eliminate much of the slowdown at zone transitions. I
was able to maintain a smooth 25 FPS at all times with these changes.
Corrected an issue that might cause regular Diablo II to crash when
switching between using D2MultiRes and regular Diablo II. The
resolution you use while playing D2MultiRes will now be stored in
a different registry key, preventing it from interferring with the
normal Diablo II resolution registry key. If you've already used
D2MultiRes and their is an invalid value in your Diablo II resolution
registry key, it will be defaulted back to 800x600 to prevent issues.
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Changes in v1.02
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Corrected the positioning of the Message Log window. The background
will no longer have its upper left corner starting in the middle of
the screen, but instead should be located in the correct position.
Added better support for Direct3D mode with perspective on. There are
still some issues, but a number of the existing issues have been
corrected. The framerate seems to be much slower in D3D (even with the
perspective option off) so DirectDraw is still a better choice.
Changed the drawing of ground tiles/objects to hopefully pick up a
larger area of rooms in larger resolutions and a smaller area in smaller
resolutions. I have noticed there still seems to be some dissappearing
objects on the very edge of the screen in larger resolutions.
Added logging, which will be stored as D2MultiResLog.txt in the current
directory (generally your Diablo II directory). This should provide
more information about errors if they come up.
Changed a bit of code that was preventing the DLL for loading if it was
unable to find the Diablo II standard resolution registry entry. Instead
it will now use a default of 800x600 (this only applies for setting the
resolution to use the first time D2MultiRes is used on a machine).

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Make sure to subscribe! Guys welcome to my first how-to video!This should be all the files you need here:(Multi. 2/3/15-added No Equipment Loss on Death Mod. 12/18/14-added Easy Unsocket and Respec mod. 12/15/14-added No Intro mod. 10/29/14-fixed text in Balanced Better Drops mod. 7/15/2014-updated Balanced Better Drops mod to add class-specific item gambling and bonus set. 2/21/2014-updated for patch 1.13d. 4/17/2010-updated for patch 1.13.

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