This map is an old version of ep2_outland_08 and 09 maps from Half-Life 2: Episode Two. In the retail version of the game, the two maps consisted of the player fighting against a Combine chopper in one, and an Autogun in the other.
This map, however, contains the original, unused, trainyard portion. This trainyard would later be replaced with the car repair shop that is seen in the retail version.
This version was found in the leaked HL2 episodes VMF mappack.
Map fix by Витой.