Images included on the wiki should be limited to in-game captures, trailers and development. These images should always be of the highest resolution available. They should be consistently formatted and not negatively impact the organization of the article.
When including numerous photos on one article, editors should make use of a gallery to properly organize these images.
As a general rule; real-world images fall outside of the scope of the wiki and should never be included in articles. The notable exception of this is relevant photographs directly related to the development of the video-game.
Adding irrelevant photos or poorly formatting them can sometimes be construed as achievement boosting and will be dealt with by an administrator.
Images uploaded for use on a user's talk page are not subject to the above rules, but should adhere to the communities standards of behavior, and should never be pornographic, racist, bigoted, advertising or otherwise offensive or contradict Wikia Terms of Agreement.
If you are unsure, be sure to ask an Administrator.