I am looking to expand my graphic design services more into the gaming & esports space. For example, esports jerseys, Twitch.tv streaming graphics, web themes & templates, etc.
In many cases users love to have specific game related assets (sprites, character artwork etc) including in the designs. There is currently to my knowledge no Shutter Stock type exchange for officially licensing game related assets. Most hobbyists and gaming graphic artists typically grab wallpapers and screenshots publicly available for a given game (often from the official developer website) and modify them to their needs. However this is a niche space that I believe flies under the radar or concern of the larger companies.
Many game developers will offer a "Media" repository on their official website, with artwork and wallpapers for their game. However there's usually no permitted use or licensing info.
Is there a legal way to use game related artwork or wallpapers in commercial products or graphic design services?