Game software maker Sega Corp. said Tuesday it expects a bigger group net loss for the first half that ended Sept. 30 due to an appraisal loss of 23.8 billion yen on its securities holdings in the wake of falling share prices.

Sega said it expects a group net loss of 20 billion yen for the first half of its business year, up from the earlier projected loss of 4.3 billion yen.

But the firm raised its estimates for group pretax profit and sales for the first half on better-than-expected domestic sales of entertainment products, such as video game software and character goods.