June has certainly been the month of State of Decay on Xbox Live Arcade. The zombie apocalypse simulator has broken records, becoming the platform’s fastest selling original IP, and garnering praise from critics and audience alike, which we shared in our official review. Celebrating yet another milestone, State of Decay has ousted Minecraft: Xbox 360 Edition at the top of the list for weekly Arcade sales, according to Microsoft’s Larry Hyrb. It’s a feat that’s been accomplished only once since Minecraft‘s release, conceding top honors to Terraria – Xbox 360 Edition for a short time before reclaiming the title.

To keep the good news train a-rollin’, Australian fans may soon be able to contribute to those impressive figures as developer Undead Labs confirmed State of Decay is being prepared for resubmission to the Australian Classification Board after being refused classification earlier this week. In a message posted on their forums, Labs’ Founder Jeff Strain explained, “We’ve run afoul of certain prohibitions regarding the depiction of drug use. We’re working with Microsoft to come up with options, including changing names of certain medications in the game to comply with ratings requirements.”

In the spirit of staying true-to-life, State of Decay incorporates all sorts of real-world medications and edibles in order to stave off injury and illness, including stimulants, amphetamines and morphine. Undead Labs’ community manager Sanya confirmed via Twitter the modification was to rename the substances in order to comply with classification guidelines.

Though the modified version will be identical to the existing versions already on market, with the exception of the renamed substances, it will need to go through the whole certification process once more. There’s no word when the Australian Classification Board will re-review the title, but Sanya continued, “I’d guess it’s a couple weeks out. But it’s in the pipeline.”