Mobile/social game giant Zynga has made four more acquisitions in mobile gaming, having already picked up quite a few iOS and mobile development companies in the past. This time around, the biggest pickup is a company from Germany named Gamedoctors, makers of the very popular ZombieSmash title. Page44 Studios is the second purchase. They did work on the also very popular mobile version of World of Goo (though Page44 isn't the actual developer of the original game; that's 2D Boy). Hiplogic and Astro Ape Studios are the last two purchases, each with their own libraries of a
