Video game vertical ad net GiantRealm has raised $2 million from Softbank for a total first round of $5.5 million, the company says. This latest infusion comes about two months after GiantRealm raised $3.5 million from Comcast Interactive Capital with an assist from seed funding participant Edison Venture Fund. The New York-based company plans to use the proceeds for hiring additional sales, editorial, and operations staff, as well as sales offices in Los Angeles and San Francisco.