Quick Starfinder developer note.
In Starfinder? The names of classes, archetypes, bonus types, magic items, class features, hybrid items, technological items, equipment, the word level, and spells ARE NOT CAPITALIZED the way feats, skills, and HP/RP/SP are.
It’s not “The Gramarthurge is an Archetype exclusive to Technomancers that gains Word Abuse at 2nd Level, which boosts the utility of Spell Cache.”
It’s “The gramarthurge is an archetype exclusive to technomancers that gains word abuse at 2nd level, which boosts the utility of spell cache.”
But it’s still “The gramarthurge gains Toughness as a bonus feat, and a +2 insight bonus to Diplomacy when speaking or writing.”
As for why?
Well for every game, that’s a house style call, generally lead up by the editors and publisher, and possibly creative directors and designers.
It’s a process that involves a lot of smart people with a lot of opinions, and I am far from the most important (or most informed) member of that group, but as general guidelines:
If a detect magic spell will cause it to ping, it get italicized. So spells, magic items, hybrid items. This makes it easy for a GM to know what is magic without always looking it up.
If the term has been capitalized in every version of the d20 rules in our ancestry for 19 years (skills, feats), it gets capitalized. The original logic (IIRC) was that if we didn’t capitalize skill and feat names, they would get lost as game terms, and they were each their own highest-level header independent of any other game element. For example, you don’t capitalize class features because they are elements of a larger sub-category, the class. But each feat is all of that feat, and same with skills.
If the abbreviation of a multi-word game term is capitalized so it won’t be lost, and uses the first letters of the game term, the full term is capitalized. So HP leads to both Hit Poitns and Hull Points, but XP does not lead to experience points being capitalized. This isn’t true for all d20 games.
Otherwise normal rules of grammar apply, so elebrian isn’t capitalized for the same reason human isn’t, but Deoxian (as in a resident of the undead world of Deox) would be for the same reason American is.
And you can always check a game’s glossary and/or index, and always ask your editor/developer if they have a style guide.
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