Related to sounds, visual effects, UI-related features, etc.

Something doesn't work the way it's supposed to.

Related to features, be it adding, removing, or improving new features.

Requires major codebase changes to accomodate the change or is otherwise a big undertaking.

Under-the-hood codebase improvements.

Affects gameplay balance.

Changes aimed at improving the quality of life.

VM aborts, crashes, or other critical bugs.

Will result in progress loss or something may break.

Comments, manuals, etc.

Makes things go faster.

Content like weapons, items, etc. Mainly applies to gameplay mods.