Proper nouns must be capitalized, while common nouns are always lower case. When in doubt, follow the AOLP 1990 capitalization rules.
The real issue is understanding what is a proper noun within the game context. Capitalize all Items Names/Skills/Characters/Locations including banners and achievements (excluding prepositions/articles, unless they are the first or last word). Categories of items (like skin, visual, weapon, rarity, damage and event etc.) are not considered proper nouns.
If is a title, the first letter of each word, excluding preposition/articles/words with 3 or less letters must be capitalized.
DO NOT capitalize the first letter after a colon, unless it's a proper noun.
Portuguese grammar clearly states that the first letter after a colon must be lower case.
Incorrect: Visual Hasan-e: Prove minha espada.
Correct: Visual Hasan-e: prove minha espada.
DO NOT half-capitalize proper nouns.
If the proper noun has two or more words, all words except prepositions/articles should have an initial capital .
Incorrect: Receba o visual roxo Chama da verdade.
Correct: Receba o visual roxo Chama da Verdade.
DO NOT capitalize the word “event” in event names.
Most event names imply it is an event (natal, festival, festa etc.). If the name makes sense without the word 'event', it can be omitted. In case it shows up, use lower case. The only exception is the event name must incorporate the word 'event' to make sense; in this case, you should capitalize as Evento X.
Incorrect: Compre itens do Evento Natal Nevado na loja.
Correct: Compre itens do evento Natal Nevado na loja.
Correct: Compre itens do Natal Nevado na loja.
Incorrect: Compre itens do evento Natalino na loja.
Correct: Compre itens do Evento Natalino na loja.
If you are unsure of whether something is a proper noun, reach out to the PM for more context.