Charles Huang, Co-Founder of RedOctane, the organization behind blockbuster Guitar Hero, spoke at an intimate gathering of 60 startup entrepreneurs yesterday, as part of the SparkLabs incubation program. His success with Guitar hero ranks in the top five biggest gaming hits ever, yet his modesty was clearly apparent as he spoke honestly about three elements required for success as a startup. Firstly, startup entrepreneurs must have unrelenting passion for what they do…