StarCraft "is hands down one of the best, if not the best, real-time strategy games ever created." StarCraft is frequently included in the industry's best games rankings, for example it ranked 37 in Edges top 100 games of all time. StarCraft has even been taken into space, as astronaut Daniel T. Barry took a copy of the game with him on the Space Shuttle mission STS-96 in 1999. StarCrafts popularity resulted in Guinness World Records awarding the game four world records, including "Best Selling PC Strategy Game," "Largest Income in Professional Gaming," and "Largest Audience for a Game Competition" when 120,000 fans turned out to watch the final of the SKY proleague season 2005 in Busan, South Korea. Researchers have shown that the audience for watching StarCraft games is diverse and that StarCraft uses instances of information asymmetry to make the game more entertaining for spectators. In addition, StarCraft has been the subject of an academic course; the University of California, Berkeley offered a student-run introductory course on theory and strategy in spring 2009. After its release, StarCraft rapidly grew in popularity in South Korea, eventually making its way to become the country's national e-sport after establishing a successful pro-gaming scene. Professional gamers in South Korea are media celebrities, and StarCraft games are broadcast over three television channels dedicated to the professional gaming scene. Professional gamers in South Korea have gained television contracts, sponsorships, and tournament prizes, allowing one of the most famous players, Lim "BoxeR" Yo-hwan, to gain a fan club of over half a million people. One player, Lee Yun-yeol, reported earnings in 2005 of . StarCraft was part of the United States Air Force's Air and Space Basic Course, used to teach newly active officers about crisis planning under stress and joint service teamwork. Other efforts to make more 'realistic' current-day battle software led to distractions when simulated hardware didn't align with the real hardware active duty officers knew about. The science fiction setting allowed students to focus on the battle tactics. The annual Conference on Artificial Intelligence and Interactive Digital Entertainment hosts a competition for AIs playing the game. As of 2015, humans still win. In 2014, an unofficial version for the Pandora handheld and the ARM architecture became available by static recompilation and reverse engineering of the original x86 version. The original game, along with the expansion, was released for free in April 2017. In