Yes! Anyone can add a game to the Giant Bomb Wiki. Simply make a free site account and visit www.giantbomb.com/game/create/.
You will need to provide a title and a cover image. Keep in mind that all text must be 100% unique to Giant Bomb (no copy/pasting from elsewhere, even if you wrote it), and all descriptions should be in a neutral third-person voice (no marketing or "back of box" copy).
Your submission will be reviewed by a moderator and approved or disapproved in a day or two. Please keep an eye on your private messages on the site for any notifications about the status of your submission. If you have any issues with your submission you can follow up with our mods at email@example.com.