The victorious South Australian premier has announced that former backbencher John Rau will replace Michael Atkinson as Attorney-General of the state.

Chris Pryor of the Games4Croydon party said last night via Twitter that the long-serving Rau is "a supporter of the R18+ classification for games (and a nice guy to boot)".

Pryor blogged on Monday that "seeing the role of Attorney-General filled by someone other than Mr Atkinson was a primary founding goal of Gamers4Croydon".

"With less than 6 months to prepare, no political experience, and only a few thousand dollars funding, we have achieved that goal.

"Unfortunately there are never any guarantees in politics, but we have removed the largest impediment to classification reform."