Blazblue: Calamity Trigger was a hit on Xbox 360 and PS3. The game has just now been released on the PC and you can get it for half price.
As a special launch promotion for the game, Games for Windows is selling the game for only $17.49. This is down from the usual price of $34.99. This offer is until June 29th so you better hurry to take advantage of this sweet deal.
You can order Blazblue: Calamity Trigger via Games for Windows by clicking here.