this is an open source version of the sequel to TTD. It is kind of like the difference between Roller Coaster Tycoon 1 vs 2; there are more pieces (you can go

this is an open source version of the sequel to TTD. It is kind of like the difference between Roller Coaster Tycoon 1 vs 2; there are more pieces (you can go diagonal and there are choices of curve radius that impact speed), there are more train types, etc.