In order to play Railroad Tycoon you must identify pictures of locomotives.
I will attempt to describe them. First I will group them by the number of wheels
on the engine itself and the number of wheels on the following coal car.  

Engines with two wheels:
0-4-0 Grasshopper---no following coal car
2-2-0 Planet---two wheels on following coal car

Engines with three wheels:
4-2-0 Norris---one large wheel on the left, two small wheels on the right
	    ---two wheels on following coal car
2-2-2 Patentee---one large wheel in the middle, two small wheels on either side
	      ---two wheels on following coal car
0-6-0 DX Goods---three wheels on following coal car

Engines with four wheels:
4-4-0 American---two large wheels on the left, two small wheels on the right
	      ---four wheels on following coal car
4-4-0 Claud Hamilton---two large wheels on the lt and two small wheels on the rt
		    ---three wheels on coal car
2-6-0 Mogul---three large wheels on the left, one small wheel on the right
	   ---four wheels on following coal car
F3-A Diesel-Electric---two small wheels on the far left
		    ---two small wheels on the far right
		    ---no following car
		    ---Now check the angle formed by the front window and the
		       area in front of the window, on this train it is not a
		       right angle. The front of the engine is not sloped like
		       an air plane.
EMD GP Diesel-Electric---same wheel arrangement as above also no following car
		      ---On this engine there is a right angle just to the
			 right of the window.
0-8-0 Webb Compound---four wheels the same size on the engine, evenly spaced
		   ---three wheels on the coal car
V200 B-B ---four small wheels on the engine
	 ---no coal car This engine has a cab on both ends.
TGV---Four small wheels on the engine.
   ---No coal car. This is the famous French high speed train.
   ---The nose of the engine slopes down much like an air plane.
4-2-0 Iron Duke---one small wheel, large wheel then two small wheels in order 
		  left to right
	       ---three wheels on coal car
	       ---This engine has what looks like a smoke stack over the far 
		  left wheel on the coal car
4-2-2 Stirling---same wheel arrangement as above
	      ---no smoke stack on the coal car
	      ---No bell shaped object protruding from the top of the engine
4-2-2 Johnson Midland Spinner---same wheel arrangement as the Iron Duke and 
	Stirling with no smoke stack on coal car. The Spinner has a bell shaped
	object protruding from the top of the engine.

Engines with five wheels:
4-6-0 Ten-Wheeler---three large wheels on the lt and two small wheels on the rt
2-8-0 Consolidation---four large wheels on the lt and one small wheel on the rt


Engines with six wheels:
4-6-2 Pacific---one small wheel, three large wheels, then two small wheels in
		order from left to right coal car
	     ---two small wheels on the far left and two small wheels on the 
		far right
4-6-2 A1 Class (Gresley)---same engine wheel arrangement as above coal car
	     		---four evenly spaced small wheels
			---No connection at cab roof line between the 
			   engine and coal car
4-6-2 A4 Class---same engine and coal car wheel arrangement as A1 Class
	      ---There is a connection at the cab roof line between the 
		 engine and the coal car.
2-8-2 Mikado---one small wheel, four large wheels, one small wheel in order
	       from left to right
	    ---does have a coal car
1-DO-1 Class E18---same engine wheel arrangement as the Mikado
		---no following car
		---engine has two overhead electrical connections
6/6 GE Class Crocodile---one small wheel, a group of two small wheels,
			 another group of two small wheels, and one small wheel
			 in order from left to right
		      ---no coal car
Bo-Bo-Bo RE Class 6/6---three groups of two small wheels no coal car

Engines with eight wheels:
4-8-4 242 A1--- the only engine with eight wheels

Engines with ten wheels:
2-6-6-4 Mallet (Challenger Class)-the only engine with ten wheels