Just wondering what content am i able to use when doing a game i had a text based game base in mind but idk what scenes i can use or smth
I totally depend in what context you ask the question.
Here: Whatever you want.
On internet and SubscribeStart: Mostly whatever you want.
On Patreon or itchio: Everything except stolen content and not stolen real life photography.
On Steam: Everything that you can prove as being legally created, what mean that using an Illusion's studio is to avoid.
Legally: Only content you own the rights over.