Social networking service Tagged, Inc. announced it has acquired the social game network hi5 today, doubling Tagged’s monthly active users to 20 million. The combination will also increase the total number of registered users to 330 million, up from 100 million.

According to The WSJ’s report, the deal’s terms were not disclosed, but include the hi5 website and user base.

Hi5 used to be among the top three social networks in 2008, behind MySpace and Facebook, but suffered as Facebook began to move into international markets. Since then, hi5 has tried to remain competitive by reinventing itself as a social gaming company. In February of 2010, it acquired the social game developer Big Six, whose platform was to become a part of the hi5 network. Earlier in the year, the company suffered from layoffs and also hired a new CEO, Bill Gossman.

read more on this start up acquisition.