Geometry Wars: Retro Evolved 2 - native launcher.
What you get: the recompiled game (6,029 PowerPC functions rebuilt as native x86-64), a native Vulkan renderer and native audio, in a small launcher. No game data is included - you point it at your own copy.
Source: your own dump of the Geometry Wars: Retro Evolved 2 Xbox Live Arcade package (title 584108FF) - the single LIVE / CON / PIRS file, or a folder of its extracted files. The importer also installs DLC packs.
Run it:
# Linux
tar --zstd -xf geometrywars2-launcher-linux-x86_64.tar.zst
cd geometrywars2 && tools/port_gui.sh # or ./run.sh
# Windows: unzip the windows launcher and run Launcher.bat
Needs a Vulkan GPU driver. CONVERSION.md inside the bundle has the details.