The PC version of Sonic & SEGA All Stars Racing is having a 75% discount on Steam for the next 24 hours, costing $3.74/3.74€/£2.49.
http://store.steampowered.com/app/34190/Just a note, unlike the consoles versions, the PC version doesn't support online multiplayer, but, even without this feature, it's still a rather fun game.
