Activision ( ATVI) shares shot up more than 11% Thursday after the video-game software maker raised its guidance.The company now expects to earn 1 cent a share on $155 million in sales in its fiscal fourth quarter, which ends March 31. In January, the company projected a loss of 2 cents a share on revenue of $125 million. Following the announcement, Activision shares rose $1.52, or 11.2%, to $15.14 in regular trading. In after-hours exchanges, the company's shares kept on climbing, recently rising another 10 cents, or 0.6%, to $15.24. The improved outlook was due to a number of factors, Activision said in a statement. Results at the company's publishing and distribution divisions have exceeded its expectations. Titles such as Tony Hawk's Underground and True Crime: Streets of L.A. that saw strong demand during the holiday season have continued to post robust sales, the company said. Activision also adjusted its estimated tax rate for the quarter because of its international sales.