Vogster's MMOFPS CrimeCraft hasn't had the easiest time, and it took another hit last week when it was banned in Australia. The Australian Classification Board refused classification of the game thanks to the availability of Boosts, drugs that give the player character various buffs. The reason given? "In the board's opinion, there is insufficient delineation between the 'fictional drugs' available in game and real-world proscribed drugs."
The board elaborated a bit on their decision, pointing out strong similarities to real-world drugs: "In addition, the names of boosts mimic the chemicals and colloquial names of proscribed drugs. Examples include K-Dust, Birth, Chimera, Majoun, Betadyne ResistX and Zymek Stim-Ex, as well as the anabolics Raze and Frenzy."
Australia currently does not have any sort of R18+ classification, so a game that would receive that rating is banned. Valve worked around this in October by submitting a censored version of Left 4 Dead 2, so CrimeCraft may not be entirely without hope.