Ahead of Konami's November 6 earnings release, the Tokyo-based game maker forecasted a year-on-year net income boost of 88 percent for the six months ended September 30.
Konami expects 11.8 billion yen in net income for the period, versus 6.2 billion yen for the same period a year ago.
Operating income is expected to rise to 22.8 billion yen from 13 billion yen.
The company forecast net revenues of 146.9 billion yen for the six months, up from 133.7 billion yen.
Konami attributed the rise in earnings to "factors such as recorded steady sales of the home videogame software products, particularly Metal Gear Solid 4: Guns of the Patriots, and sales of our products for arcades and card game products have also been strong."
MGS4 released in June of this year.