Sony has knocked 25 per cent of the price of an annual PlayStation Plus subscription. Running for two weeks until September 19, the offer lets you to pick up a 365 day PS Plus pass for £29.99/€37.49, down from the regular price of £39.99/€49.99.Annual subscriptions will stack, so current subscribers can also take advantage of the reduced price. During its Gamescom conference last month, the platform holder revealed plans to bring PlayStation Plus to Vita later this year. Sony has also kicked off a Retro Games Sale on PlayStation Network today to celebrate the recent launch of PSone support on Vita.