#6 World Of Goo
World of Goo is a physics puzzle-based game in which you control balls of goo with the goal of directing them into a funnel at the end of every level.
Each ball of goo forms into a girder or joint, allowing you to construct massive goo towers in order to allow the free goo balls the ability to traverse through the map and reach the funnel at the end.
For special awards, you can complete each level in a set amount of time with the fewest possible moves and save the most goo balls you can.