libretro/genesis-plus-gx-wide

Genesis-Plus-GX-Wide is a modified version of the popular Genesis Plus GX emulator that lets you play classic Sega games in widescreen format instead of their original square-ish 4:3 aspect ratio. It supports Sega Genesis/Mega Drive, Master System, Game Gear, and SG-1000 games, aiming for near-perfect accuracy and compatibility with the original software. The underlying emulator works by recreating Sega's old console hardware in software, so your computer behaves like the original machine when running game files. This project builds on Genesis Plus GX, which itself grew from earlier emulator code and has been heavily refined for accuracy. The "wide" modification extends the visible game area horizontally, so you see more of the game world on modern monitors rather than stretching the image or adding black bars. This would appeal to retro gaming enthusiasts who play classic Sega titles through frontends like RetroArch, BizHawk, or OpenEmu and prefer a wider picture on today's displays. If you grew up playing Sonic, Phantasy Star, or Streets of Rage and want them to fill a modern widescreen TV more naturally, this project serves that audience. The README itself focuses on the parent project rather than the widescreen changes, so details about how the widescreen feature is implemented or which specific games benefit most aren't covered. The codebase is written in C and distributed under a non-commercial license, meaning it can be freely used and ported but not sold commercially. Compiled builds are available for Gamecube/Wii and RetroArch on Windows if you want to try it without compiling from source.