Merck tapped a team of IPG agencies, consisting of Initiative and Draftfcb, among others, to handle its consolidates media planning and buying account, valued at $600 million.

Activision Blizzard awarded TBWA/Chiat/Day U.S. creative duties for its Guitar Hero brand. Crispin Porter + Bogusky previously handled the $13 million advertising account.

Kaspersky Labs awarded IP Pixel digital creative duties on the global launch of its latest product, PURE total computer protection software. The agency will be developing a Web site and social media extensions for the product, launching this spring.

Warschawski was named U.S. agency of record for Go Ape, a treetop adventure company.

Connelly Partners was tapped to handle advertising duties for Samsonite.

Dentsu America was picked to create the new visual voice for Microsoft Advertising industry marketing at the 2010 Cannes Lions International Advertising Festival and Awards.

Century 21 Real Estate named MRM Worldwide as its lead agency for national advertising and Mullen as lead agency for the brand's public relations and social media chores.

Brunner has been named agency of record for Eaton Corporation's Vehicle Group. The agency won the account following a six-month review. The Vehicle Group includes Eaton's Automotive and Truck businesses. Brunner has been agency of record for Eaton's Golf Pride brand since 2003.

Hilton Hotels placed its global creative account in review. Incumbent Young & Rubicam will defend.

Orbitz selected BBDO to handle creative chores on its $40 million advertising account.