The company reported operating income of 4.6 billion won ($3.4 million) for the quarter ended in September, a 53 percent drop compared to a year ago.
Net income was down 50 percent year-on-year to 5 billion won.
Lower sales of Guild Wars and Lineage drove sales down 2 percent year-on-year to 78.3 billion won. Management said Guild Wars sales decreased because there was no expansion pack released during the quarter.
According to NCsoft, there were over 5.6 million active accounts for Guild Wars in the U.S. and Europe as of September 2008. Guild Wars 2 is currently in development by NCsoft's ArenaNet.
Despite subpar Q3 performance, NCsoft CFO Lee Jae-Ho remained optimistic about Q4 and beyond. "With the launch of Aion in Q4, however, we think operating income will rebound in Q4 and going forward," he said during an earnings call Wednesday.
After launching in Korea, Aion is slated to launch in China, North America, Europe and Japan next year. It began open beta testing earlier this week.
NCsoft execs said they were pleased with Aion's beta reception. The beta started with 18 servers, but NCsoft had to increase that number to 25 to accommodate traffic, with each one able to hold 5,000 concurrent players.
"We're very much surprised from the response from our customers," Jae-Ho said.
Sales for NCsoft's latest major release, Tabula Rasa, were 1.8 billion won for the quarter, down 13 percent from the previous quarter making it the worst sales performer among all of NCsoft's MMOs.