The name may make BCS sound dull, but actually, it's quite entertaining--and quite innovative. In a series of levels of increasing difficulty, you're challenged to build increasingly complicated bridges, then drive over them in a train--and if you haven't done a good enough job, watch it collapse. The key is that it's in 3D with a robust physics engine that simulates the stresses on bridge members in detail, and provides a nice view of the occasional disasters. It's no surprise that BCS won the "audience choice" award at the 2003 Independent Games Festival. (Mac and Linux versions, too.)
