It does not overwrite or conflict with existing Blizzard installations or modern Battle.net launchers.
The "exclusive" portable builds often include pre-integrated quality-of-life (QoL) fixes that are not present in the vanilla Blizzard installer: diablo 2 lod 113c portable exclusive
The "Portable" aspect is a fan-driven phenomenon. Unlike modern versions tied to the Battle.net launcher, the could be easily isolated into a single folder that didn't require a full system installation or registry keys to run. Patch 1.13 (Diablo II) - Diablo Wiki It does not overwrite or conflict with existing
: Added support for blit scaling, allowing the game to be maximized to the largest 4:3 resolution supported by your monitor. diablo 2 lod 113c portable exclusive