Title pretty much says it all:  Capcom and Valve will be offering SFIV PC for 50% off (only $19.99 in the US), this weekend only.  

That makes this a no-brainer for anyone that somehow doesn't have SFIV yet, or if you're just a tweaker like me and need to have it for every platform (plus PC version has those purdy graphical filters).

Scary Ryu face says head over to Steam and buy it now!