Ironwail

A fork of the popular GLQuake descendant QuakeSpasm with a focus on high performance instead of maximum compatibility, with a few extra features sprinkled on top.

Features:

• ability to play the 2021 release content with zero setup: if you have Quake on Steam, you can unzip the latest Ironwail release in any folder (that doesn't already contain a valid Quake installation) and simply run the executable to play the game, including any add-ons you have already downloaded
• new Mods menu, for quick access to any add-ons you've already installed
• ability to change weapon key bindings using the UI, not just the console
• ability to use the mouse to control the UI
• alternative HUD styles based on the Q64 layout (classic one is still available, of course)
• real-time palettization (with optional dithering) for a more authentic look
• classic underwater warp effect
• more options exposed in the UI, most of them taking effect instantly (no vid_restart needed)
• support for lightmapped liquid surfaces
• lightstyle interpolation (e.g. smoothly pulsating lighting in ad_tears)
• reduced heap usage (e.g. you can play tershib/shib1_drake and peril/tavistock without using -heapsize on the command line)
• reduced loading time for jumbo maps
• slightly higher color/depth buffer precision to avoid banding/z-fighting artifacts
• a more precise hackwork-around for the z-fighting issues present in the original levels
• capped framerate when no map is loaded
• ability to run the game from a folder containing Unicode characters

Notes:

1. These requirements might not be 100% accurate since they are based solely on reported OpenGL capabilities. There could still be unforeseen compatibility issues.
2. Mac OS is not supported at this time due to the use of OpenGL 4.3 (for compute shaders), since Apple has deprecated OpenGL after version 4.1.