World of Goo 2

Connect living goo balls into bridges and towers that bend under their own weight, then guide the remaining creatures toward an exit pipe. Every ball used for reinforcement is one less available to collect, so reaching the destination and building efficiently are different problems. The sequel adds flowing liquid that can be redirected, used to extinguish fires or converted into more building material. New species stretch, shrink, explode or launch liquid, turning some stages into problems of fluid transport and terrain manipulation rather than simply building higher. Five chapters contain more than 60 levels, with additional objectives that encourage revisiting a working structure and finding a less wasteful solution.