[iOS] Steins; Gate HD EN $12.99, Corpse Party $2.99 Visual Novel Games @ iTunes

Other games from the same publisher are also on sale, like other Steins;gate series and Chaos;Head, but most are in Japanese.
The end date of the sale is written as 22/3 in the app description, but probably it is US Pacific Time (6pm AEST).
Not sure what's the original price in Australia, from appshopper it's US$23.99 for Steins;Gate HD EN.
Be careful to buy the English version and the right version(iphone/ipad).
They are available on Android too, but at a steeper price.