An Australian politician who opposes the lifting of a censorship ban on adults-only computer games has said he feels more threatened by gamers than outlawed motorcycle gangs.

South Australia's Attorney-General Michael Atkinson, who has the right to veto the lifting of a national ban on computer games rated too violent and extreme for consumption, said he had received a threatening note from a gamer.

"I feel that my family and I are more at risk from gamers than we are from the outlaw motorcycle gangs who also hate me," he told the Australian Broadcasting Corporation late Monday.

"The outlaw motorcycle gangs haven't been hanging around my doorstep at 2:00 am, a gamer has."

Australia currently has a ban on adults-only, or R18+, computer games although films with the same rating in terms of violence, strong language, nudity, drug use and adult themes are allowed.