There's about a day left on the deal, which is enough time to pick up one of the best arcade racing games of all time.
While nobody would uphold the original GRiD game as some pinnacle of simulation, it's still - even in 2016 - a very, very decent arcade racer. And as an added bonus, it's free on Humble Bundle.
Most PC hardware in the last year or two should be able to run GRiD smooth as silk at 4K as well, so that's something you should absolutely take of. There's also a great set of mods that increase the difficulty of the career mode, the intelligence of the AI, add a 5th class to the 24-hour Le Mans race, and more.