A free computer game allowing players to zap and destroy HIV has been released, aimed at young people. The Hong Kong Aids Foundation's 'Mission 2000' bilingual CD-Rom includes a role-playing game where a character has to save a friend infected with the virus. While zapping the virus, the character learns not to make the choices that led to his friend's exposure to HIV, said Aids Foundation spokeswoman Elsa Lai. The CD-Rom was given away at events yesterday at East Point City in Tseung Kwan O and at Times Square, Causeway Bay. The disc will be a mainstay of the foundation's Healthy Young Ambassador Training Scheme, which will take about 40 teenage students and teach them how to educate their peers about safe sex. 'The lack of a good understanding of sexually transmitted diseases (STDs), Aids and safer sex among young people has made many vulnerable to infection by HIV,' Ms Lai said. Speaking as part of an Aids prevention programme initiated by the Coalition of Aids Service Organisations this month, a gay secondary school student, Tim, 17, criticised the lack of safe-sex information available. 'Last year, a government nurse visited our school to teach a lesson about safe sex. What she kept showing us were some disgusting pictures of people contracting STDs, saying the diseases were the results of promiscuity,' he said. 'She was not teaching us to have safe sex, but she was forcing us to accept her ethical values - not to have premarital sex.' At the end of March, there were a reported 1,399 HIV-positive people and 455 with Aids. About half of HIV/Aids patients are under 19.