Valve’s much-anticipated Steam summer sale is now underway.

The sale runs until July 23, offering the usual mix of daily deals, flash sales, community choice deals, and general discounts on Windows PC, Linux, and Mac titles.

Notably, for the next 20 hours BioShock Infinite is half price, and for the next four hours Skyrim’s Legendary Edition is 40 per cent off.

Elsewhere, Dragon Age: Origins is 70 per cent off, and XCOM: Enemy Unknown and The Walking Dead are half price.