The London Underground is the world's first underground passenger railway, having opened in 1863. Its 11 lines move about 5 million passengers a day to 270 stations, along 400 km (250 mi) of track.<br/><br/>The massive network of London Underground stations makes up one of the most complex transportation systems in the world, and On the Underground...

NOTE: This mini-expansion requires a copy of On the Underground: London / Berlin.<br/><br/>In The Underground Challenge, you will compete against real Underground lines. The map starts with multiple lines already built, and you must try to beat the Underground's score.<br/><br/>Much like the engineering crews of the London Underground, you must be quite...