The Seumas McNally Grand Prize is the main award given at the Independent Games Festival (IGF), an annual event that takes place during the Game Developers Conference, one of the largest gatherings of the indie video game industry. The award is named after computer game programmer Seumas McNally (1979–2000), founder of independent game development company Longbow Digital Arts. McNally died of Hodgkin's lymphoma shortly after receiving the award, then just the IGF Grand Prize, in 2000 for his game Tread Marks. The award is given alongside a prize of US$30,000.

The Game Developers Conference (GDC) is an annual conference for video game developers. The event includes an expo, networking events, and awards shows like the Game Developers Choice Awards and Independent Games Festival, and a variety of tutorials, lectures, and roundtables by industry professionals on game-related topics covering programming, design, audio, production, business and management, and visual arts.