Video games are not broadly banned in Australia. The country operates a mandatory classification system (administered by the Australian Classification Board) that rates games by content. Titles refused classification (RC) cannot be sold, hired, or advertised—effectively a commercial ban—but this applies to a tiny fraction of releases.
The vast majority receive ratings (G, PG, M, MA15+, R18+) and sell freely. Always verify a specific title’s status on the Classification Board’s public database before importing.