OK, I know a lot of people who still love playing Diablo 2 (my girlfriend included). She actually re-installed this the other day and she asked me “How come I can’t get rid of the black bars on the sides of the screen?”. The answer to this question is because Diablo 2 only supports a maximum screen resolution of 800×600. I showed her how to stretch the game across the whole screen but wouldn’t it be great to be able to play Diablo 2 at higher screen resolutions? Well, now you can.
I came across a really great article at N.E.E.T. Gamer which explains how it all works. You basically install some software which runs from the Diablo 2 game directory modifying the game to run in higher resolutions. The reason why something like this is able to work is because the graphics engine Diablo 2 uses is able to scale graphics accordingly based on your screen resolution (it can already do this between 640×480 and 800×600 anyway) unlike previous Blizzard games before it (StarCraft 1, WarCraft 2, etc) that used sprites of fixed size which could not be scaled or re sized without stretching and warping the image badly.
Here’s a quick link to the D2MultiRes Patch: http://www.moddb.com/games/diablo-2/downloads/d2multires-version-102