Software Giant to Buy Video Game Ad Seller

Microsoft Corp. agreed to buy Massive Inc., a closely held seller of video game advertisements, to gain early entry into a new ad market. Terms weren’t disclosed.

Massive, based in New York, has agreements with more than 30 game publishers and has run campaigns for Nokia and Time Warner Inc.’s Warner Bros.

Microsoft is trying to boost the percentage of revenue it gets from advertising by expanding from website ads to spots on mobile phones and video games and with Office Internet services.