Green Banner Event Co. is an independent, community-driven events company focused on creating competitive tabletop gaming and eSports experiences. It organizes premier tournaments across the American West, featuring games such as Warhammer 40,000, Marvel Crisis Protocol, Age of Sigmar, Star Wars: Legion, The Old World, and Conquest. Its events are designed to combine high-level competition with a welcoming atmosphere where players can connect and build community.

In addition to major tournaments, Green Banner runs regional competitive leagues with regular play and structured competition, offering players a way to develop their skills and progress toward larger events. Leagues are available in locations including Grand Junction, Houston, Raleigh-Durham, Reno, Rockford, Salt Lake City, and San Diego, as well as through an online 40k league.

The company emphasizes independence, fair and consistent judging, and thoughtful event planning centered on the player experience. Its website also provides event details, registration access, player packs, league information, standings, and a shop for tickets and related offerings.