The Steam Monster Summer Sale 2015 will continue until July 21, but please note that some of the games are available at a discounted price only for a few hours, so make sure that you buy them when you see an article like this one. Today’s Steam sale comes with only two games for Linux gamers, The Talos Principle, which has been tagged with a 66% off discount, and Verdun, which is 50% off for the next 40 hours, at the moment of writing this article.