The initial known gaming competition took place on 19 October 1972 at Stanford School for the game Spacewar.[15] Stanford students were invited to the "Intergalactic spacewar olympics" whose grand award was a year's subscription for Rolling Rock, with Bruce Baumgart earning the five-man-free-for-all tournament and Tovar and Robert E. Maas being successful the Team Competition.[16] The Space Invaders Championship performed by Atari in 1980 was the initial large scale video game competition, appealing to more than 10,000 participants across the USA, establishing competitive video games as a mainstream hobby.[17] In the summer of 1980, Walter Day founded a high credit score record keeping business called Twin Galaxies.[18] The business went on to help promote video gaming and publicize its details through publications including the Guinness E book of World Documents, and in 1983 it created the U.S. National Video Game Team. The team was involved with contests, such as joggin