Bridge Builder - build a bridge which has to support a passing train and stay undamaged. Each bridge element is $100 and your budget is limited.
Download the original freeware version of the game
West Point Bridge Designer - The West Point Bridge Designer will introduce you to engineering through an authentic, hands-on design experience. This software provides you with the tools to model, test, and optimize a steel highway bridge, based on realistic specifications, constraints, and performance criteria. (The West Point Bridge Designer Version 4.1.1 is for IBM-compatible computers running Windows 95 or better. It requires 16 MB of RAM and 8 MB of hard disk space and is constantly being updated and debugged.)
Download the free West Point Bridge Designer
Designing and Building File-Folder Bridges: A Problem-Based Introduction to Engineering
Chronic Logic - makers of the official sequel to a freeware game (Bridge Builder) in which you design and test bridges.
Discover Engineering Online: Games
If you know of any other civil engineering related games on the internet, please send me the URLs. ( firstname.lastname@example.org )