milsko/doc/TIERS.md

Ports of Milsko are grouped into three "tiers" in terms of their support.

• Tier 1: Before every new release of Milsko, these platforms will be tested to make sure they have full support, and the CI will test them.
• Tier 2: These might be outdated or not updated in awhile, they might only compile under a specific version/commit of Milsko. Authors of these backends will be made aware of these updates.
• Tier 3: These are outright unfinished. Only use these if you're a developer.

Currently, the Tier 1 backends are:

• Windows 9x+/NT 4.0+
• Any Unix/Linux system that supports X11 or Wayland.

There are currently no Tier 2 backends.

Tier 3 backends are:

• Mac OS X 10.4+ with Cocoa
• Mac OS 7-9, PowerPC (68k support not planned).