OpenTTD

a.k.a. OTTD

published in 2004, running on Windows

type: strategy, manag./econ.
genre: Train simulator
perspective: bird's-eye
player options: single player, LAN, Internet

other: Free OpenSource Software
languages: chi cze dan dut eng fin fre heb ger ita jpn kor pol por rus spa swe other

4/5

Comment

As of 2009 the project reached a state at which it no longer required external resources. Prior to this players were required to have the original TTD's data files, though the game still retains option to copy assets from the TTD CD if you have it available.